As millions of Americans are expected to pack commercial flights over the July 4th holiday, the union representing the Federal Aviation Administration’s air traffic controllers says a recent government watchdog report is proof the agency and Congress must fix a “flawed staffing model.” “The status quo is no longer sustainable,” said Rich Santa, head of the National Air Traffic Controllers Association. The union says that Congress must “require FAA to immediately implement” new staffing standards and “conduct maximum hiring.” “There are currently 1,200 fewer fully certified controllers today compared to ten years ago,” said Santa. “FAA’s flawed staffing model and...