“American intelligence officials have found no evidence that aerial phenomena witnessed by Navy pilots in recent years are alien spacecraft, but they still cannot explain the unusual movements that have mystified scientists and the military, according to senior administration officials briefed on the findings of a highly anticipated government report.”

Which means:

1) There’s no evidence that the various UFO sightings over the years are aliens.
2) The US government has no idea what these aircraft, in fact, are…

“US intelligence officials have found no evidence confirming that unidentified flying objects encountered by US Navy pilots in recent years were alien spacecraft but also have not reached a definitive assessment as to what these mysterious objects might be, according to five sources familiar with the findings of an upcoming report on UFOs that is expected to be delivered to Congress later this month.

“According to three of those sources, the report does not however rule out the possibility they are alien spacecraft.”

If there is anyone around who really knows WTF is going on up in the sky…they ain’t telling us!