UPDATE: SpaceX launch postponed due to bad weather

Hurley, 53, and Behnken, 49, are both two-time shuttle fliers.

UPDATE: Bad weather postpones first launch of NASA astronauts from Florida in nine years. Next attempt is Saturday.   CAPE CANAVERAL, Fla. (AP) — With thunderstorms threatening a delay, two NASA astronauts climbed aboard a SpaceX rocket ship Wednesday for liftoff on a history-making flight that was seen as a giant leap forward for the booming business of commercial space…