That would take them to a safe bunker below the pad in an unlikely emergency situation.

During a simulated pad emergency on Launch Pad 39A at NASA's Kennedy Space Center in Florida, members of the STS-134 crew check out a slidewire basket that would take them to a safe bunker below the pad in an unlikely emergency situation. The emergency training while aboard space shuttle Endeavour is part of a week-long Terminal Countdown Demonstration Test (TCDT).

Endeavour's six crew members are targeted to launch April 19 at 7:48 p.m. EDT. They will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer-2 (AMS), a high-pressure gas tank, additional spare parts for the Dextre robotic helper and micrometeoroid debris shields to the International Space Station. This will be the final spaceflight for Endeavour. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett