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what some think america needs to do. that is, write a new constitution. and then he'll speak to one of the top scientists responsible for the web telescope and those awesome images it has captured. these videos show explosions that have happened in the last two weeks at russian military facilities in crimea, which has been occupied by russian forces since 2014. one attack at an air base destroyed at least seven russian warplanes. ukraine has claimed responsibility for that attack and two others, according to an internal ukrainian government document obtained by cnn. is this evidenc...

with a country that some think is what america needs to do, that is write a new constitution. and he will speak to one of the top scientists responsible for the webb telescope and those awesome images it has captured. these videos show explosions that have happened in the last two weeks at russian military facilities in crimea, which has been occupied by russian forces since 2014. one attack at an air base destroyed at least seven russian warplanes. ukraine has claimed responsibility for that attack and two others according to an internal document obtained by cnn. is this evidence th...

Knew whatever is out there, we'll see it. >> when i think of it as a layman, what strikes me as extraordinary about this telescope is on the one side, it faces the sun and has this -- the heat that is facing is extraordinary. on the other side, it's facing cold temperatures like you can't imagine. describe how that works. >> the sun shield blanks out the sun and lets it cool down to almost the temperature of cold space. the temperature of the telescope. the 3 metric tons has to get to about 55 degrees kelvin, about minus 361 degrees fahrenheit. we can do that because we're looking at infrared ...

Out there, we're going to see this. >> what strikes me is extraordinary about this telescope is on the one side, it faces the sun and has this -- the heat that it's facing is extraordinary. on the other side, it's facing cold temperatures like you can't imagine. describe how that works. >> the sun shield blocks out the sun and lets the cold side passively cool down to almost the temperature of cold space, to the temperature of the telescope, the three metric tons of that telescope has to get down to about 55 degrees kelvin, which is about minus 361 degrees fahrenheit. it has to do that because...