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and no leads in that cocaine mystery at the white house. the secret service just briefing lawmakers on their investigation. our nbc news reporters are following all of the latest developments. i want to begin with that update on the cocaine discovered at the white house. nbc's ryan nobles is up on capitol hill, where it looks hot and the heat was on those investigators. what did they tell those lawmakers? >> reporter: not very much. at least when you talk to republicans, chris, they seemed very unhappy with the information that the secret service was able to provide both the oversigh...

around that time, scientists learned something extraordinary. whales were communicating with each other. sometimes by song over long distances. in part, because of that discovery, scientists and conservationists rallied to enact laws to protect the whales and it worked. the humpback whale population has made a remarkable comeback. now they face a host of new threats. global warming is killing off their food source and human activity is causing thousands of whale deaths a year from the stress of underwater construction noise to fishing entang amments and ship collisions. in the next h...

50 years ago humpback whales were considered an endangered species after decades of commercial whaling decimated the population. around that same time scientists learned something extraordinary. whales were communicating with each other, sometimes by song over long distances. in part because of that discovery scientists and conservationists rallied to enact laws to protect the whales, and it worked. the humpback whale population has made a remarkable comeback. but now they face a host of new threats. global warming is killing off their food source, and human activity is causing thous...

>> freedom is not free. the united states and the freedom for which it stands, the freedom of which they died, must endure and prosper. their lives remind us that freedom is not bought cheaply. it has a cost. it imposes a burden and just as they whom we commemorate willing to sacrifice so to must we. in the last final less heroic way willing to give of ourselves. yeah i remember him. americans coast to coast will commemorate more than 1 pngts 1 million brave men and women who have died defending our country solemn occasion dates back to deadliest conflict ever the civil war originall...

>> freedom is not free. the united states and the freedom for which it stands, the freedom of which they died, must endure and prosper. their lives remind us that freedom is not bought cheaply. it has a cost. it imposes a burden and just as they whom we commemorate willing to sacrifice so to must we. in the last final less heroic way willing to give of ourselves. yeah i remember him. americans coast to coast will commemorate more than 1 pngts 1 million brave men and women who have died defending our country solemn occasion dates back to deadliest conflict ever the civil war originall...