With Endeavour trip, NASA to unite 'lucky 13'

NASA, the U.S. space agency, is counting on it. When the seven crew members of space shuttle Endeavour meet up with the six astronauts on the international space station in a few days, the 13 visitors from Earth will comprise the largest space get-together. Endeavour is set to blast off Saturday at 7:17 a.m. ET for a 16-day mission to help expand the space station. The rendezvous will be truly