Commander Steve Lindsey led his crew of astronauts out for a walk beneath space shuttle Discovery this afternoon following ht successful completion of the STS-133 mission. NASA Administrator Charlie Bolden and Kennedy Space Center Director Bob Cabana were among the officials on hand to greet the shuttle’s crew. Discovery just completed its last mission and is being prepared on the runway at NASA’s Kennedy Space Center in Florida so it can be towed to Orbiter Processing Facility-2.