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Harbor unit boats, which are all in the water. you've been seeing them going by. and just talk about the security measures because you can imagine what an undertaking it is for them. there are thousands of officers that are going to be here on the streets, but of course also up in the air, on the water. they have been working on this plan for tonight for months. but it's really been the last week where they really ramped up and put together their plan and started doing scuba diving underneath the barges that are going to be holding the fireworks. they have been working with the emergency servi...

Posts that you will not see. we have explosive detective canines at every entry point so it's a great, safe event people should come out and enjoy themselves. >> reporter: of course nypd has the most incredible technology at their hands. this year they're going to be using drones. they'll be able to detect what's going on in the crowd. officers are able to talk to people from those drones if they need be. it's going to be an incredible show. of course they want to say no credible threats at all. it's going to be safe and a lot of fun. >> it's wonderful. it looks like a great day outside. thank...

Evening. we'll bring that to you as well. but if you are looking for the nation's biggest fireworks display, you have to come to new york. the 43rd annual macy's fireworks extravaganza. millions of spectators will line the east river to get a firsthand look and millions more will be watching at home. cnn national correspondent brynn gingras is there. you only have several hours to wait for the big show. >> reporter: i know. why am i here now? i should be here hours from now. anyway, this is a good spot if you are in new york. the reason it's a good spot is because i'm going to zoom in. in is...

And washington, d.c. there's a lot of degree of coordination between all of the cities so it's somewhat uniform and coordinated at a national level. so while they don't have this type of event very often, i think they're, you know, quite well-prepared. >> absolutely. how much does the vatican security and those people that travel with the pope, how much do they have to work in concert or do they i guess hand over the reins to the new york whether it's secret service or police or federal agents that are keeping on top of things? who's in charge? >> well, there are a lot of people in charge. in ...