Many people struggle more with their fear of turbulence on aeroplanes. Many people's fear of flying stems from a variety of factors. For some travellers, the experience is frightening not just because of the turbulence but also because they feel that they have no control over the manner of transportation. Two Ethiopian Airlines pilots fell asleep while flying from Khartoum, Sudan, to Addis Abeba, Ethiopia, and they missed their landing. The investigation found that Air Traffic Control (ATC) issued an alarm as flight ET343 approached the airport but did not start its descent. The aircraft was moved by ATC in order to prepare for a runway landing. Fortunately, no one was wounded, and the plane could safely descend. While the pilots slept, the autopilot system on the Boeing 737 kept the plane cruising at 37,000 feet.
