The first grounding of all U.S. commercial air flights since 9/11 commenced Wednesday morning around 3 a.m. before being lifted five hours later, the Federal Aviation Administration announced. An FAA computer system that pilots use to access flight plans and communicate with air traffic control went offline about 3 a.m. CST, stranding passengers and backing … Continue reading Flights resume after first all-U.S. grounding since 9/11