The first was allowed to pass through the gate, but then a guard suddenly opened fire on the second vehicle, killing both americans inside. The americans in the third and fourth vehicles jumped out and started returning fire. The jordanian guard shot and killed one of them before he was wounded by the other. Jordanian officials originally blamed the americans for failing to stop at gate. But the u. S. Embassy in jordan said in a statement, there is absolutely no credible evidence they did not follow proper procedures. The fbi is leading the investigation, but so far has been unable to question the shooter because he is in a medically induced coma. John . David martin at the pentagon. Thank you, david. In morocco today nearly 200 countries reaffirmed their support for the Global Climate agreement reached in paris last year. Many are worried president elect trump will pull out of the deal. Further south in Africa Climate change is taking a toll own dajd mountain gorillas. Mark phillips has more in his ongoing series the climate diaries. Reporter theres a population up there on the slopes of these volcanic peaks in Central Africa that knows nothing of arguments in washington about Climate Change. But the famous gorillas in the mist do know something is going on. They know the bamboo chutes that make up a major part of their diet and which used to sprout like clockwork are now less predictable. The rains that produced them were a month late this year. The gorillas have had to adapt their roaming and foraging path patterns because the old seasonal rhythms of Food Production have altered. Their world is changing. These guys are the 800pound gorillas in the room except of course they really weigh in at about 400 pounds and theyre not in control of event, theyre the potential victims of them. The gorillas problems are made worse by the troubles of their distant cousins and close neighbors, people. Because the late rains have also made the water supply down in the valleys less reliable, local villagers have been going up into gorilla country where theyre not supposed to go to bring that Good Mountain water home. And park ranger abel musana says water isnt the only thing people are after. When there is that kind of change and drought 37. Reporter drought . Drought, yes. The harrest will be impacted and people are coming to invade the habitat which is for gorillas. When people are low on food they come into the park looking for food. Yes. Reporter the human population has ballooned in the areas surrounding the park and when these people are forced up the mountains, david grier of the World Wildlife funds great apes program says they bring disease and other dangers with them. They have to enterritory park to get action to this clean water. In the mean time they might want to set a snare for kafg an ungulate for food. An antelope or something. Right. But some poor ape steps in it p. Exactly. Reporter thats what happened to this gorilla films bay 60 minutes team a few months ago. The snare was removed by a vet who has helped the ape population increase lately. Still there are only about 880 mountain gorillas left in the world all here, confined to these mountain tops. Theyre already considered critically endangered. And as their world changes, they have nowhere to go. Mark phillips, cbs news in Volcano National park, r wapdwa. Coming up next, how facebook and twitter are changing after the lekelection. And later, theres no slowing down this old cowboy at roundup time. Im here in bristol, virginia. And now. Im in bristol, tennessee. On this side of the road is virginia. And on this side its tennessee. No matter which state in the country you live in, you could save hundreds on Car Insurance by switching to geico. Look, im in virginia. Im in tennessee. Virginia. Tennessee. And now im in virginessee. See how much you could save on Car Insurance. Or am i in tennaginia . Hmmm. Mthat stuff only lasts a few hours. Or, take mucinex. One pill fights congestion for 12 hours. Guess i wont be seeing you for a while. Why take medicines that only last 4 hours, when just one mucinex lasts 12 hours . Lets end this. Ltry align probiotic. N your digestive system . For a nonstop, sweet treat goodness, hold on to your tiara kind of day. Get 24 7 digestive support, with align. The 1 doctor recommended probiotic brand. Now in kids chewables. In germany today president obama called the spread of fake news online a threat to democracy. Facebook and other social media sites are being criticized for not doing enough to stop bogus stories that seem to dominate the election cycle. Jericka duncan has more on this. Reporter when a satirical website headlined a story pope francis shocks the world, backs trump, the fake news went viral. Waves of false headlines on social media have turned readers into believers. This week social media giants facebook and google said they will go after hoax websites by restricting ad revenue. Facebook is also planning to launch a program allowing users to flag fake news. Journalism professor jeff jarvis. The slope is very slick, if we try to make facebook and google and company into censors. You cant find a position that just because somebody doesnt like it and doesnt trust it it gets killed. It would be very dangerous to have blacklists and to ban sites, i think. Reporter twitter is taking a different approach. A new feature rolling out this week allows users to mute key words, phrases and even entire conversations. Tuesday it suspended several accounts supported by white nationalists, including richard spencers, a leader of the altright movement, which is based on white identity. Are you an advocate for an allwhite United States of america . No. I dont think that is going to happen. I want to first raise consciousness of who we are amongst europeans in the United States. And second, i want to promote policies that really have a realistic chance of being implemented by the donald trump administration. Reporter twitters rules prohibit violence, threats, harassment and hateful conduct. A spokesperson from twitter says they dont comment on accounts theyve suspended for privacy and security reasons. John . Thank you, jericka. Coming up, the first flakes in a city that was sweltering one day ago. Its judgment day. Back seat chefs peer inside your oven. But youve cleaned all bakedon business from meals past with easyoff, so the only thing they see is that beautiful bird. Go ahead. Let em judge. Whfight back fastts, with tums smoothies. It starts dissolving the instant it touches your tongue. And neutralizes stomach acid at the source. Tum tum tum tum smoothies only from tums ill take it from here. Im good. I just took new mucinex clear and cool. Ah whats this sudden cooooling thing happening . Its got a menthol burst. You can feel it right away. Wow, that sort of blindsided me. And it clears my terrible cold symptoms. Ahh this is awkward. New Mucinex Fastmax clear cool. Feel the menthol burst. And clear your worst cold symptoms. Start the relief. Ditch the misery. Lets end this. A neighborhood in canton, illinois is recovering from a tremendous gas explosion last night. Surveillance cameras captured the moment it happened. A worker repairing a gas leak was killed. About a dozen other people were hurt. Windows were shattered blocks away. Across the southeast 50 large wildfires have destroyed about 120,000 acres from alabama to virginia. Arson is suspected in many of them. Arrests have been made in tennessee and kentucky. A large fire in georgia was sparked by lightning. In the west snow is finally falling in colorado, utah, and wyoming. Some areas could get eight inches or more tonight. It had been unusually warm in the rockies, 80 degrees yesterday in denver. Up next, hoofs pounding, hearts racing. Its roundup time. Our final stop tonight is home on the range, where hundreds of the nations most treasured animals will be auctioned off over the weekend. Of course, you cant sell them till you round them up. And chip reid got to ride with the trail boss. Reporter the earth rumbles as 1,100 buffalo stampede across the south dakota prairie while about 60 volunteer cowboys and cowgirls ride herd, including okay, i want somebody to sit right here. Reporter 81yearold bob lantis. I dont care who. Two people. If you aint in there and charging youre about right. Reporter this spurjingling, chapswearing buck arao has participated in the nations biggest buffalo roundup of its kind for the past 45 years. So whats the best part of the roundup, bob . Well, to me its the run. When youre actually pushing the buffalo and theyre running just as hard as they can run, were running as hard as we can run, its an adrenalinekicking son of a gun, ill tell you that for a fact. Reporter a lot of fun, yes, but a buffalo can weigh 2,000 pounds, and some of them have an altitude. Just ask firsttimer chris richgels. Well, i had a bull turn and come at me on my horse and we had to boogie out of there pretty quick. It made for a memorable event. Reporter more than 30 million buffalo once roamed the u. S. , but in the 1800s they were slaughtered by pioneers almost to extinction. Today one of the countrys largest wild herds calls Custer State Park home. Theres a purpose to this roundup. Yes, very definitely. Its for the health of the herd. Health of the herd, to hold the herd in a manageable number so that they dont overgraze the land. Ready. Reporter after the roundup theyre vaccinated, calves are branded and some cows are sold. For landis it never gets old. When you quit doing your thing you that like to do, youre going to die. Team, spread out across here. Reporter for this cowboy living a good long life means making your home where the buffalo roam. Chip reid, cbs news, in the black hills of south dakota. Thats the overnight news for this friday. For some of you the news continues. For others check back with us a little later for the morning news and of course cbs this morning. From the Broadcast Center in new york city, im john dickerson. Announcer this is the cbs overnight news. Welcome to the overnight news. Im michelle miller. World leaders meeting at the u. N. Climate change summit in morocco called on all nations to make the highest political commitment to addressing the rise in global temperatures. Many at the meeting are concerned that president elect donald trump will pull the u. S. Out of the paris climate treaty. Mr. Trump has called Climate Change a hoax and several of the names being mentioned to head the Environmental Protection agency agree with him. Heres the president elect on the campaign trail last may. Were going to cancel the paris climate agreement and stop [ applause ] unbelievable. And stop all payments of the United States tax dollars to u. N. Global warming programs. Reporter Scientists SayClimate Change is melting glaciers as well as the snow caps of the north and south pole, leading to a rise in sea levels. But the effects can also be felt in the heart of africa. As Mark Phillips found out in his series the climate diaries. Reporter theres a population up there on the slopes of these volcanic peaks in Central Africa that knows nothing of arguments in washington about Climate Change. But the famous gorillas in the mist do know something is going on. They know the bamboo shoots that make up a major part of their diet and which used to sprout like clockwork are now less predictable. The rains that produced them were a month late this year. The gorillas have had to adapt their roaming and foraging patterns because the old seasonal rhythms of Food Production have altered. Their world is changing. These guys are the 800pound gorillas in the room except of course they really weigh in at about 400 pounds and theyre not in control of events. Theyre the potential victims of them. The gorillas problems are made worse by the troubles of their distant cousins and close neighbors, people. Because the late rains have also made the water supply down in the valleys less reliable, local villagers have been going up into gorilla country where theyre not supposed to go to bring that Good Mountain water home. And park ranger abu musana says water isnt the only thing people are after. Thats kind of change in when drought. Yes. Drought. Drought. They will be impacted and the people are coming between the habitat for gorillas when the people are low on food they come into the park looking for food. Yeah. Reporter the human population has ballooned in the area surrounding the park. And when these people are forced up the mountains, david grier of the World Wildlife funds great apes program says they bring disease and other dangers with them. They have to enterritory the park to access this clean water. In the meantime they might want to set a snare to catch a ungulate or something. An antelope. Exactly. But an ape might step in it. Reporter thats what happened to this gorilla a few months ago. The snare was removed by one of the vets whose work is to help the ape population increase lately. Still there are only about 880 mountain gorillas left. In the world. All here, confined to these mountaintops. Theyre already considered critically endangered. And as their world changes they have nowhere to go. Mark phillips, cbs news, in Volcano National park, rwanda. Believe it or not, its the pentagon that leads the way in green technology. Americas most advanced jet fighter can take to the skies without using a drop of oil for fuel. And the navy has an entire green fleet. Don dahler reports. Reporter this ea18 growler can go over 1,100 miles an hour. It cost 68 million. And its flying on 100 sbo fuel, made from things like kitchen grease and plant seeds. Secretary of the navy, ray mavis. The engine doesnt function any differently with bio fuels . It may burn a little cleaner. But no. Otherwise, the engine doesnt notice a different. Reporter in 2009 mavis committed the navy to 50 usage of alternative fuels by the year 2020. Why has thi been such a 50 c being brought into afghanistan. Thats too high a price to pay. Until reechtly petroleum had to be added to bio fuel to pack enough punch to be feasible but a panama city company a. R. A. Was working on a process to make sterile waters in remote areas when they stumbled on a way to make bio fuel identical to petroleum. We make jet andll. All the same molecules as petroleum crude but from a feed stock. One of those feed stocks is ethiopian mustard seeds that can be grown in arid ground and be useds a rotation crop. Also waste grease from Water Treatment plants and kitchens. Aras Senior Vice PresidentGlen Mcdonald saw an opportunity for his company and the world. I lope that one day all diesel vehicles are operated with our fuel. I hope that all commercial jets are operated with our fuel. Reporter as for the u. S. Navy that goal is well under way. Alternative fuels now power 30 of naval ships and 50 of its bases. Don dahler, cbs news, panama city, florida. Facebooks plan to remove fake news stories from its site is raising some questions about whether that amounts to a violation of free speech. But a new study shows that people who get their news from facebook are looking at more fake stories than real ones. Jericka duncan reports. Reporter when a satirical website headlined a story pope francis shocks the world, backs trump, the fake news went viral. Waves of false headlines on social media have turned readers into believers. This week social media giant facebook and google said they will go after hoax websites by restricting ad revenue. Facebook is also planning to launch a program allowing users to flag fake news. Journalism professor jeff jarvis. The slope is very slick if we try to make facebook and google and company into censors. You cant find a position that just because somebody doesnt like it and doesnt trust it it gets killed. It would be very dangerous to have blacklists and to fan sites i think. Twitter is taking a different approach. A new feature rolling out this week allows users to mute key words, phrases and en entire conversations. Tuesday it suspended several accounts supported by white nationalists including richard spencers, a leader of the altright movement which is based on white identity. Are you an advocate for an allwhite United States of america . No. I dont think that is going to happen. I want to first raise consciousness of who we are amongst europeans in the United States. And second i want to promote po silent night holy night sleep in heavenly peace sleep in heavenly peace mthat stuff only lasts a few hours. Or, take mucinex. One pill fights congestion for 12 hours. Guess i wont be seeing you for a while. Why take medicines that only last 4 hours, when just one mucinex lasts 12 hours . Lets end this. President ial election just was not the same without jon stewart. He left the daily show last summer, just as the campaign was heating up. Turns out he spent the past few months writing a book about his 16 years on comedy central. Charlie rose sat down with him for a postelection analysis. We just went through an election. What . Yes. Your reaction to this election . Surprise . Surprise fear . It all ties together. Well, fear. You know, heres what i would honestly say. I dont believe we are a fundamentally different country today than we were two weeks ago. The same country, with all its grace and flaws and volatility and insecurity and strength and resilience exists today as existed two weeks ago. The same country that elected donald trump elected barack obama. I feel badly for the people for whom this election will mean more uncertainty and insecurity. But i also feel like this fight has never been easy and the ultimate irony of this election is the cynical strategy of the republicans, which is our position is government doesnt work, we are going to make sure that it doesnt drain the swamp. But theyre not draining the swamp. Mcconnell and ryan, those guys are the swamp. And what they decided to do was im going to make sure government doesnt work and then im going to use its lack of working as evidence of it. Donald t