KENNEDY SPACE CENTER, Fla. -- At the Space Station Processing Facility, the STS-104 crew look over equipment as part of Crew Equipment Interface Test activities. Starting second from left are Mission Specialists James F. Reilly II, Janet L. Kavandi, Pilot Charles O. Hobaugh, Commander Steven Lindsey and Mission Specialist Michael L. Gernhardt. The STS-104 mission will carry the Joint Airlock Module to the International Space Station. The U.S.-made module will allow astronauts and cosmonauts in residence on the Station to perform future spacewalks without the presence of a Space Shuttle. The module, which comprises a crew lock and an equipment lock, will be connected to the starboard (right) side of Node 1 Unity. Atlantis will also carry oxygen and nitrogen storage tanks, vital to operation of the Joint Airlock, on a Spacelab Logistics Double Pallet in the payload bay. The tanks, to be installed on the perimeter of the Joint Module during the mission"'"s spacewalks, will support future spacewalk operations and experiments plus agument the resupply system for the Station"'"s Service Module.