Scott Lee grew up on the Gulf coast of Florida. Once in a while, on a clear night, at the right time of year, he could walk outside, look 150 miles to the East, and see the glow of a shuttle launch from Cape Canaveral.
"As they rise upwards, they kind of start to curve," Lee said. " And it's a really interesting phenomenon, because they're still just going straight up. But to you, it looks like they're coming back down. So you start to wonder... 'Is something wrong?' "