Mike Massimino is fitted with his helmet during suitup before heading for Launch Pad 39A and launch of space shuttle Atlantis.

In the Operations and Checkout Building at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Mike Massimino is fitted with his helmet during suitup before heading for Launch Pad 39A and launch of space shuttle Atlantis. Liftoff is scheduled for 2:01 p.m. May 11 EDT. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade NASA's Hubble Space Telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Photo credit: NASA/Kim Shiflett