Stock Photo - 05/08/2002 __ At Pad 39A, technicians install the replacement wrist joint for the Space Station Remote Manipulator System into Space Shuttle Endeavour´s payload bay. The new wrist joint, called an Orbital Replacement Unit ORU, will be installed next to the arm´s Latching End Effector during the final of three planned spacewalks. Mission STS_111 is designated UF_2, the 14th assembly flight to the International Space Station. Endeavour´s payload includes the Multi_Purpose Logistics Module Leonardo and Mobile Base System. The mission also will swap resident crews on the Station, carrying the Expedition 5 crew and returning to Earth Expedition 4. Liftoff of Endeavour is scheduled between 4 and 8 p.m. May 30, 2002