Unidentified flying object

People use night vision goggles to look at the night sky during an Unidentified Flying Object (UFO) tour in the desert outside Sedona, Arizona, Feb. 14, 2013.

Pentagon confirms secret UFO investigation program ran from 2007 to 2012

Global Politics

Whether the Advanced Aviation Threat Identification Program has continued to investigate UFO sightings since its funding ended five years ago could rank as an unexplained phenomenon.

The World

UFO reports increase: why do so many believe?

Environment
The World

Celebrating World UFO Day

Arts, Culture & Media
The World

Britain opens UFO files

Environment
The World

The World – Episode 20071113 – A call to re-open the UFO file