Unsealed: Alien Files - Seeing Is Believing

Seizoen: 4 - Aflevering: 6 / 91 - Eerst uitgezonden: 08 mei 2015 - Episode ID: 1140691

For decades, governments around the world have investigated UFO sightings, often times under an umbrella of secrecy. How are these top-secret studies conducted? Who is called upon to analyze the evidence?