Hi Bob & All,
It was a bunch of alien insetoids that launched a rocket. True, you can see the video of the launch here:
http://www.spacex.com/updates.php
note the giant alien insectoid in front of the camera a few seconds into the video at about the launch moment.
More seriously this "USS" (ie "unidentified sky sighting") was probably the first launch and test flight of the new Falcon9 Spacex rocket that occurred only 50 minutes before these sightings so it is very likely they were connected. The sightings were quite likely of the stage separation (you can also see in the video) or engine shutdown.
Assuming it was the Falcon9, that'd make it a IFO ... no?
Sanity strikes again ...
Best,
Les D