Rocket debris from China's space launch is on its way back to Earth — and scientists have no idea where it will fall

CAPE CANAVERAL, Fla. – Sandwiched by billowing clouds above and smoke and steam clouds below, space shuttle Atlantis hurtles past the lightning mast on top of the fixed service structure on Launch Pad 39A at NASA's Kennedy Space Center in Florida. Atlantis will rendezvous with NASA's Hubble Space Telescope on the STS-125 service mission.