JSC2009-E-087202 (23 April 2009) --- Astronaut Scott Altman, STS-125 commander, responds to a question from a reporter during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087212 (23 April 2009) --- Astronauts Mike Massimino (left) and Andrew Feustel, both STS-125 mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087197 (23 April 2009) --- Astronaut Megan McArthur, STS-125 mission specialist, fields a question from a reporter during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087199 (23 April 2009) --- Astronaut Michael Good, STS-125 mission specialist, responds to a question from a reporter during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087200 (23 April 2009) --- Astronaut John Grunsfeld, STS-125 mission specialist, fields a question from a reporter during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087196 (23 April 2009) --- Astronaut Gregory C. Johnson, STS-125 pilot, is pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087208 (23 April 2009) --- Astronauts Michael Good (left), Megan McArthur, John Grunsfeld, Mike Massimino and Andrew Feustel, all STS-125 mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087220 (23 April 2009) --- Astronaut Mike Massimino (right), STS-125 mission specialist, responds to a question from a reporter during a STS-125 preflight press briefing at NASA's Johnson Space Center. Astronaut John Grunsfeld, mission specialist, is at left.

JSC2009-E-087209 (23 April 2009) --- Astronauts Gregory C. Johnson (partially out of frame at left), STS-125 pilot; Michael Good, Megan McArthur, John Grunsfeld and Mike Massimino, all mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2009-E-087203 (23 April 2009) --- Astronauts Megan McArthur, John Grunsfeld (second left), Mike Massimino and Andrew Feustel, all STS-125 mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2008-E-096965 (December 2007) --- Astronauts Mike Massimino (right) and Mike Good, STS-125 mission specialists, with home plate from New York City's Shea Stadium during a break from their training in the JSC Neutral Buoyancy Lab. The plate will fly with the STS-125 crew aboard the Space Shuttle Atlantis. (Photo Credit: NASA)

JSC2008-E-096966 (December 2007) --- Astronaut Mike Massimino, STS-125 mission specialist, with home plate from New York City's Shea Stadium during a break from training in the JSC Neutral Buoyancy Lab. The plate will fly with the STS-125 crew aboard the Space Shuttle Atlantis. (Photo Credit: NASA)

Prince Philip, left, speaks with veteran space walkers John M. Grunsfeld, center, and Michael J. Massimino at NASA's Goddard Space Flight Center. Photo Credit: (NASA/Chris Gunn)

JSC2008-E-031811 (2 April 2008) --- Astronaut Michael T. Good, STS-125 mission specialist, participates in an extravehicular activity (EVA) hardware training session in the Space Vehicle Mockup Facility at NASA's Johnson Space Center.

JSC2008-E-031810 (2 April 2008) --- Astronauts John M. Grunsfeld, STS-125 mission specialist, participates in an extravehicular activity (EVA) hardware training session in the Space Vehicle Mockup Facility at NASA's Johnson Space Center. Flight director Tony Ceccacci looks on.

JSC2008-E-031808 (2 April 2008) --- Astronauts John M. Grunsfeld (right), Andrew J. Feustel, Michael T. Good and Michael J. Massimino (second left), all STS-125 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Space Vehicle Mockup Facility at NASA's Johnson Space Center. Tomas Gonzalez-Torres (left) assisted the crewmembers.

JSC2008-E-031809 (2 April 2008) --- Astronauts Andrew J. Feustel (right) and Michael T. Good, both STS-125 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Space Vehicle Mockup Facility at NASA's Johnson Space Center.

JSC2008-E-031807 (2 April 2008) --- Astronaut John M. Grunsfeld, STS-125 mission specialist, participates in an extravehicular activity (EVA) hardware training session in the Space Vehicle Mockup Facility at NASA's Johnson Space Center.

JSC2008-E-031816 (2 April 2008) --- Astronauts John M. Grunsfeld (right), Michael J. Massimino, Andrew J. Feustel and Michael T. Good, all STS-125 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Space Vehicle Mockup Facility at NASA's Johnson Space Center. Tomas Gonzalez-Torres (left) assisted the crewmembers.

JSC2008-E-031815 (2 April 2008) --- Astronauts Michael J. Massimino (center), John M. Grunsfeld (right), Michael T. Good (right background) and Andrew J. Feustel, all STS-125 mission specialists, participate in an extravehicular activity (EVA) hardware training session in the Space Vehicle Mockup Facility at NASA's Johnson Space Center.

JSC2008-E-031806 (2 April 2008) --- Astronaut Andrew J. Feustel, STS-125 mission specialist, participates in an extravehicular activity (EVA) hardware training session in the Space Vehicle Mockup Facility at NASA's Johnson Space Center.

Prince Philip greets astronauts from STS-125 L to R Andrew J Feustel, Michael T Goode, K. Megan McArthur, Michael J. Massimino, Gregory C. Johnson, and Commander Scott D. Altman. Photo Credit: (NASA/Chris Gunn)