At Denver, the plane waited on the tarmac for refueling and for a new crew took over. Then, at 6:52 p.m., it took off again, bound for Portland, Oregon and Seattle, Washington. Sadly, the flight would never reach its final destination.
At 6:56 p.m., the aircraft sent a transmission confirming that the flight was proceeding as planned. But just seven minutes later, about 7:03 p.m., air traffic controllers at Stapleton International Airport spotted two strange lights in the sky.
After about 30-45 seconds, witnesses saw the two lights fall out of the sky, followed by another flash of light close to the ground. Concerned, controllers began contacting all of the nearby aircraft. Soon they realized that only one was unaccounted for – Flight 629.