Space Shuttle Launch Delayed at Least 72 Hours

NASA has pulled the plug on launching the space shuttle Endeavor later on Friday afternoon. Shuttle Launch Director Mike Leinbach called off the launch due to issues with Auxiliary Power Unit 1 heaters. NASA said the launch will be postponed at least 48 hours as engineers look into the matter.

UPDATE: NASA just moved it back at least 72 hours. The earliest the shuttle will take off now is 2:33 on Monday afternoon.