Discovery is outfitted with a redesigned external fuel tank, and has dozens of motion and temperature sensors embedded in the wings to detect any blows from fuel-tank foam insulation or other debris. The spaceship also holds a brand-new laser-tipped 15-metre boom that will be used by the astronauts to survey the wings and nose cap for any cracks or holes.More details at News24.
I really hope NASA will be able to successfully launch the Shuttle tomorrow. Another disaster like Columbia in February 2003 might have some nasty consequences for manned space exploration.