CNN.com - Clinton aide slams Pentagon's UFO secrecy

One winter night in 1965, eyewitnesses saw a fireball streak over North America, bank, turn and appear to crash in western Pennsylvania. Then swarms of military personnel combed the area and a tarp-covered flatbed truck rumbled out of the woods.

Specifically, the Coalition for Freedom of Information (CFI) is pressing the Air Force for documents involving Project Moon Dust and Operation Blue Fly, clandestine operations reported to have existed decades ago to investigate UFOs and retrieve objects of unknown origins.