The Belgian UFO Wave and the mysterious disappearance of Frederick Valentich are two examples of inexplicable strange sky phenomena. One event that spread over a two year period and was witnessed by thousands while the other was a singular event which became a frightened pilot's final testament. Lastly Chicago's 2006 O'Hare Airport UFO sighting saw a massive metallic disc hover over various airport personnel before vanishing in seconds and punching a hole through the overcast. Accompany us into the clouds this week as we being our three part trilogy with 10 year Air Traffic Control veteran "John the Aviator" and break down the most credible UFO cases in history.