This was the first Space Shuttle mission during which a spacewalk was conducted, and the first in which the Extravehicular Mobility Unit (EMU) was used.

The equipment lock is where the Extravehicular Mobility Units are stored and preparations for spacewalks are carried out.

NASA's Extravehicular Mobility Unit uses a fiberglass Hard Upper Torso (HUT) and fabric limbs.

Extravehicular Mobility Unit used on both the Space Shuttle and International Space Station.

An Atlantis astronaut with a jet pack called an Extravehicular Mobility Unit would have hopped over to the Columbia, carrying more jet packs and canisters to clean up the air.

When the United States resumed EVAs on April 7, 1983, astronauts started using an Extravehicular Mobility Unit (EMU) for self-contained life support independent of the spacecraft.

The LCVG used with NASA's Extravehicular Mobility Unit is primarily constructed of spandex, with a nylon tricot liner.

Both were based out of the Quest Airlock, and the spacewalkers used U.S. spacesuits, which are called Extravehicular Mobility Units, or EMUs.

SAFER is worn by every ISS crewmember using an Extravehicular Mobility Unit.

"With the shuttle program, modularity, maintainability and reliability became much more important," said Christopher Poythress, program manager for Hamilton Standard's Extravehicular Mobility Unit.