The Senate Commerce, Science and Transportation Committee is holding a hearing Wednesday afternoon to look into the impact of the 43-day government shutdown on U.S. flight safety, travel and the economy. During the record-long lapse in funding, the Transportation Department reduced flights for least 40 major airports across the U.S. as staffing shortages that already plagued the system worsened as air traffic controllers and other essential employees called out more often, chose to retire or were mandated to work overtime without pay...