JSC2002-E-25979 (21 June 2002) --- Astronaut Paul S. Lockhart, STS-111 pilot, speaks to a large crowd who showed up at Ellington Field's Hangar 990 to welcome home the STS-111 and Expedition Four crew members. At left background is NASA Administrator Sean O'Keefe. JSC Director Jefferson D. Howell, Jr., is seated immediately to the right of the lectern. The four shuttle prime crew members returned to Earth earlier in the week after two weeks in space, but for the three station crew members, this was their first time in Houston since December of 2001, having spent well over six months in Earth orbit on board the International Space Station (ISS).