S133-E-006069 (25 Feb. 2011) --- Astronaut Alvin Drew, STS-133 mission specialist, on the flight deck inside Discovery's cabin, surveys the work of the Remote Manipulator System/Orbiter Boom Sensor System (RMS/OBSS). Equipped with special cameras, the system was aiding the crew to conduct thorough inspections of the shuttle’s thermal tile system on flight day 2. Astronaut Steve Lindsey, commander, is at controls just out of frame. Photo credit: NASA or National Aeronautics and Space Administration