Argenbright managed some security operations at Boston 's Logan International Airport for US Airways , Delta Air Lines , Delta Shuttle and America West . However , Argenbright did not manage the specific checkpoints that the hijackers passed through before boarding American Airlines Flight 11 . American Airlines contracted its security operations at Logan to Globe Aviation Services . United Airlines contracted with Huntleigh USA to manage its security operations at Logan , including the checkpoint where hijackers on United Airlines Flight 175 passed through . In November 2001 , the Massachusetts Port Authority decided not to renew Argenbright 's license to operate security at Logan
American Airlines Flight 11
American Airlines Flight 11
Argenbright Security