Had to rebuy a ticket for my daughter who just graduated USMC Bootcamp. Because I had bought her ticket with the rest of the families. Was told her return ticket was cancelled because she did not check in on the first leg of travel 2 days prior. Never heard of such a thing. Thank god the other 8 of us did not go with our plan to rent a car when our flight was delayed 12 hours. Never again will I fly American Airlines.