these were peregrine falcons that they worked with. they presumed that they would just spiral and then drop down on their prey, but they attached some cameras and figured out, nope, that's not how it happened. here you can see it fixing its eye on the prey and going after it, and the video is shaky because the fal xon con is goin after a crow. they use an old sailor's trick, they intercept them. >> they lead them essentially like a football player when he leads his wide receiver and throws the ball in front of him and the guy runs into the ball the same thing the bird's doing. >> but they're not 100% effective because as you can see this video, this crow decided he'd fight back. boom. >> collission and fur and dirt flying. >> i've never seen this angle of a prey/predator interaction. >> it's actually terrifying. >> it's good to be a human, you don't have to worry about it. >> hold a class with crows and when you fly that way fake them out and go exactly the opposite direction. >>> well, here we go again surveillance video from inside a

motives omnicom i don't doubt that all your love for nature and your parents desire to protect peregrine falcon although i don't think there's any way kabul as an enduring solution to taking control of your climate. i think it's bit disingenuous to say my book shouldn't count to your views do get. you've written a book which is probably going to be very influential out there. so we read on the hill when rulemakers, some republicans already are, talking, thinking about hey, this solar geoengineering might be the answer. spin let me try to answer your question about -- clive also raised some good ones. you know, if he did this thing us talking about, just using this to slow down, to be clear what we haven't yet done is distinguished several different classes. both cutting ou our initial but once we cut emissions than we can use these carver engineering to draw down. that's a slower process. until conditions are zero that is effectively should be judged by cutting emissions -- not quite right. so the technology should be, but in any case, one benefit conceivably of going forward is it allows you t