NEW : The Federal Aviation Administration also confirmed that American had sought permission to hold flights . American CEO apologizes , says the glitch affected the backup system , too . Nationwide move is very unusual for a major U.S. airline , big delays . Comment: NEW : American said it saw no link between its problems and events in Boston .
NEW : American CEO apologizes , says the glitch affected the backup system , too . Nationwide move is very unusual for a major U.S. airline , big delays . Comment: NEW : American said it saw no link between its problems and events in Boston .