CAPE CANAVERAL, Fla. – Inside the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 crew members review procedures for entry into space shuttle Atlantis with a trainer (right). From left are Pilot Gregory C. Johnson, Mission Specialist Megan McArthur, Commander Scott Altman, and Mission Specialists Andrew Feustel and Mike Massimino. Not seen clearly are Mission Specialists Michael Good (left) and John Grunsfeld (right). Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – Inside the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 crew members review procedures for entry into space shuttle Atlantis. The crew is at Kennedy for final equipment and procedure familiarization. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – Inside the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 crew members get ready to affix the mission logo to the entrance into space shuttle Atlantis. Clockwise from left front are Pilot Gregory C. Johnson, Mission Specialists Michael Good and Megan McArthur, Commander Scott Altman, and Mission Specialists Mike Massimino and John Grunsfeld. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – In the landing area on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialists Michael Good and Megan McArthur look over a slidewire basket used for an emergency exit from the pad. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – On the fixed service structure on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 crew members review emergency exit procedures. Seen here are Mission Specialists Michael Good and Megan McArthur. Not clearly visible in the background is Mission Specialist Andrew Feustel. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – Near the bunker on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 crew members listen to a trainer review emergency exit procedures from the pad. From left are Commander Scott Altman, Mission Specialists Mike Massimino and Megan McArthur, Pilot Gregory C. Johnson and Mission Specialist Michael Good. Not clearly visible are Mission Specialists Andrew Feustel and John Grunsfeld. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – Inside Inside the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Pilot Gregory C. Johnson (left) and Mission Specialist Michael Good listen to review procedures for entry into space shuttle Atlantis. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – On the fixed service structure on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 crew members review emergency exit procedures. From left are Mission Specialist Mike Massimino, Andrew Feustel and John Grunsfeld and Pilot Gregory C. Johnson. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – In the slidewire basket landing area on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 crew members review exit techniques from the basket used for emergency exit from the pad. Visible from left are Mission Specialist Andrew Feustel, Commander Scott Altman, Mission Specialist John Grunsfeld, Pilot Gregory C. Johnson and Mission Specialist Mike Massimino. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – Near the bunker on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 crew members review emergency exit procedures from the pad with trainers. Beginning from left (behind the trainer) are Commander Scott Altman, Mission Specialists Andrew Feustel, John Grunsfeld, Mike Massimino and Megan McArthur, Pilot Gregory C. Johnson and Mission Specialist Michael Good. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – On the fixed service structure on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Michael Good reviews emergency exit procedures with a trainer. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – Inside the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Mike Massimino records the review procedures for entry into space shuttle Atlantis. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston

CAPE CANAVERAL, Fla. – In the slidewire basket landing area on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 crew members listen to a trainer reviewing emergency exit procedures from the pad. From left are Mission Specialists Andrew Feustel, Michael Good, Megan McArthur and John Grunsfeld, Commander Scott Altman, Pilot Gregory C. Johnson and Mission Specialist Mike Massimino. Space shuttle Atlantis' 11-day flight is targeted for launch May 12 and will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments. As a result, Hubble's capabilities will be expanded and its operational lifespan extended through at least 2014. Photo credit: NASA/Cory Huston