CAPE CANAVERAL, Fla. (AP) — Astronaut Peggy Whitson returned to Earth late Saturday, wrapping up a record-breaking flight that catapulted her to first place for U.S. space endurance. Whitson's 665 days off the planet — 288 days on this mission alone — exceeds that of any other American and any other woman worldwide. She checked out of the International Space Station just hours earlier, along with another American and a Russian.