May 15, 2009-- "Operator, can you help me make this call?" Pardon the Jim Croce reference, but there was a heart stopper moment during today's Hubble spacewalk outside the Space Shuttle Atlantis.  Radio contact was temporarily lost between the Shuttle and Spacewalker Mike Massamino.

"That was scary," said astronaut John Grunsfeld aboard Atlantis after transmissions resumed following several minutes of dead silence. A switch was thrown incorrectly on Massamino's spacesuit. A tougher spacewalk is ahead tomorrow when spacewalkers try to repair the broken Advanced Camera for Surveys on Hubble.