A United Airlines plane, front, is pushed back from the gate at George Bush Intercontinental Airport. (AP Photo/David J. Phillip)
A United Airlines plane, front, is pushed back from the gate at George Bush Intercontinental Airport. (AP Photo/David J. Phillip) David J. Phillip AP
A United Airlines plane, front, is pushed back from the gate at George Bush Intercontinental Airport. (AP Photo/David J. Phillip) David J. Phillip AP