NEW : The NTSB is sending a team to Asia to be `` positioned to offer U.S. assistance '' Sources say 1 of 2 stolen passports used on flight was on law enforcement database . In the wake of the crash in San Francisco, authorities are investigating whether there were any other passengers who may have been able to help identify and stop the plane before it crashed. That 's what is disturbing , as it apparently was n't checked . '' The stolen passports raise concerns about the possibility of terrorism .
NEW : The NTSB is sending a team to Asia to be `` positioned to offer U.S. assistance '' Sources say 1 of 2 stolen passports used on flight was on law enforcement database . In the wake of the crash in San Francisco, authorities are investigating whether there were any other passengers who may have been able to help identify and stop the plane before it crashed. The stolen passports raise concerns about the possibility of terrorism .