NASA is about to send people to the moon — in a spacecraft not everyone thinks is safe to fly

By Jackie Wattles, CNN (CNN) — When four astronauts begin a historic trip around the moon as soon as February 6, they’ll climb aboard NASA’s 16.5-foot-wide Orion spacecraft with the understanding that it has a known flaw — one that has some experts urging the space agency not to fly the mission with humans on