CNN Fareed Zakaria GPS March 15, 2015 14:38:00
Ready for application. >> they are developing a hypersonic plane which they hope will fly twice as fast as the sr-71 black bird which flew over three times the sound barrier. the ultimate dream would be commercial hypersonic flight. that's not the air force's mission, but he says it's possible, assuming the big challenges can be overcome, like dealing with the unreal heat involved. >> the outside of the vehicle, we're seeing 2,250 degrees fahrenheit. inside where the engine is about a toasty 200 fahrenheit. >> thanks to the lessons from the waverider, he believes we could have commercial hyper...