In an intimidating mid-air nightmare, United Airlines’ Rome-bound flight returned in less than an hour since departure and plummeted rapidly followinf likely loss of cabin pressure. According to the data provided by the tracking service FlightAware, the Boeing 777 aircraft plummeted from 37,000 feet to less than 9,000 feet in eight minutes.The flight had 270 passengers and 14 crew members, according to the airline.