Many of the testimonies are extremely persuasive. Many come from people in highly responsible positions: pilots, flight officers, even a vice president of Eastern Airlines, who allegedly spoke with a captain he assumed was in charge of the flight, before recognizing him as the late Loft.
Other sightings are convincing because they have multiple witnesses. A flight's captain and two flight attendants claim to have seen and spoken to Loft before take-off and watched him vanish - an experience that left them so shaken they cancelled the flight.
