With an added aura of sentimentality surrounding the flight, NASA space shuttle Endeavour blasted off Monday morning from Kennedy Space Center in Florida. The shuttle took off under the command of Mark Kelly, the husband of wounded Rep. Gabrielle Giffords, who was shot in the head by a politically crazed gunman months ago. According to RT: "As many as 45,000 guests jammed NASA's launch site. The crowd outside the gates was estimated to be in the tens of thousands, if not more. It was the second launch attempt. Late last month, an electrical problem halted the countdown. Endeavour and its six astronauts will arrive at the International Space Station on Wednesday. They are delivering a $2 billion particle physics experiment. The mission will last 16 days. Only one other shuttle trip remains."