Ed Weiler, Associate Administrator, Science Mission Directorate at NASA Headquarters, second from left, speaks during a press conference on the upcoming Hubble Space Telescope servicing mission as David Leckrone, Hubble Project Scientist, Preston Burch and Mike Klenlen, seated right, look on, Thursday, April 23, 2009, at NASA Headquarters in Washington. Photo Credit: (NASA/Paul. E. Alers)