Discovery's astronauts are inspecting their spaceship for launch damage.
Meanwhile, NASA engineers are trying to determine whether an apparently chipped thermal tile on the belly of the shuttle poses any danger to the spacecraft and its crew of seven. Also, a large object - perhaps a piece of foam insulation - seemed to fly off from the big external fuel tank but didn't hit the shuttle.
Officials stress that it's too early to say whether there is any danger to the shuttle or its crew.
NASA plans to stick to its original work schedule and inspect only the nose and wings. Tomorrow, Discovery will execute a slow backflip as it approaches the international space station so that the station's crew members can photograph the shuttle from various angles.