UFO Sphere in a National Geographic Documentary

Place: Gulf of Corinth, near Patras, Greece/Date: Unknown/Time: 17:00/Video added (YouTube): 2 April 2008.

This UFO footage was found in a TV documentary about the construction of the Rio-Antirio Bridge, which links the towns of Rio and Antirio in Greece.

The sphere comes in from the left, 7 seconds into this video, flies to the right and then stops right above the crane:

http://www.youtube.com/watch?v=9TeJMPTclJg