quiz:63
What milestone did NASA astronaut Don Pettit reach while returning from space?
Most people celebrate their 70th birthday with cake and family. Don Pettit, NASA’s oldest active astronaut, spent his doing something very different: plummeting back to Earth in a Soyuz capsule after a seven-month mission aboard the ISS. Pettit, along with Russian cosmonauts Alexei Ovchinin and Ivan Vagner, landed in