KENNEDY SPACE CENTER, FLA. - In the Orbiter Processing Facility, the Remote Manipulator System (RMS), also known as the Canadian robotic arm, is lowered toward Discoverys payload bay for installation. The RMS is used to deploy and retrieve payloads, provide a mobile extension ladder or foot restraints for crew members during extravehicular activities; and to aid the flight crew members in viewing surfaces of the orbiter or payloads through a television camera on the RMS. The arm is also serving as the base for the new Orbiter Boom Sensor System (OBSS), one of the safety measures for Return to Flight, equipping the Shuttle with cameras and laser systems to inspect the Shuttles Thermal Protection System while in space. Discovery is scheduled for a launch planning window of May 2005 on Return to Flight mission STS-114.