The mission to remove the two pieces of protruding filler on the Discovery belly was a success: Stephen Robinson, a mechanical engineer, only needed a few seconds to pull out each dangling piece of ceramic-fiber cloth.  However, just as this issue was solved, NASA scientists were busy trying to determine whether or not something needs to be done about a thermal blanket below the commander's window. It turns out that blanket was nicked by some debris during the launch. Some air probably got into the opening and puffed up the blanket. NASA is concerned that during the shuttle re-entry into atmosphere, the blanket might come off and smack into the shuttle.