Posted 20 March 2012 - 02:35 AM
Impressive ... since this was an airshow, the airspace would be rather tightly controlled. I would assume, then, that this is a near-field object perhaps a small UAV akin to the old Sikorsky Cypher or similar model aircraft or, as mentioned, maybe insects. Any large aircraft moving at the perceived distance and speed would have likely caused a sonic boom unless it was capable of bending natural physical laws. Pursuing this further, it seems implausible that a military entity would want to give its hand away demonstrating such an aircraft. Similarly, why would a truly alien entity, with demonstrably advanced technology, want to display its might at an airshow -- an act that could be interpreted as potentially aggressive.