The first flight of the commercially developed SPACEHAB laboratory module begins with the flawless liftoff of the Space Shuttle Endeavour from Launch Pad 39B at 9:07:22 a.m. EDT, June 21, 1993. Also planned for the eight-day flight of Mission STS-57 is the retrieval of the European Retrievable Carrier (EURECA). Onboard for the fourth flight of Endeavour are a crew of six.