The 330-foot tall mobile service tower is retracted from the Boeing Delta 4 rocket at Cape Canaveral's launch pad 37B in preparation for the planned August 15 liftoff to place the GOES-N weather satellite into Earth orbit.
Source: Spaceflight Now (3 min 36 sec QuickTime 6 file)
Download this clip to your hardrive.
(Windows users right-click this link. Mac users control-click this link)