This episode of UFO Files looks into the top secret government committee appointed by President Harry S. Truman, "Majestic 12," which is said to be responsible for the recovery, storage, and analysis of UFO technology.

Welcome to the remote, top-secret, and never-before-seen military base Kapustin Yar, where the wreckage from no fewer than eight UFO crash incidents were transported and studied between 1945 and `91.

The military has long sought ways to build an aircraft that can fly undetected. Take a look at secret Air Force plans that may offer an explanation for UFO sightings that began in 1947.

In April 1897, a mysterious airship crash rocked the small town of Aurora, Texas in a story that has even the most adamant UFO debunkers baffled. Is this the case that finally proves that UFOs are real?

In September 1977, something amazing appears in the night sky over the Brazilian island of Colares. Though a 500-page report is compiled, it's kept from the public. Examine these mysterious happenings in depth.