Emergency personnel look over a US Airways plane at Philadelphia International Airport, after the plane returned to the airport, Thursday, Sept. 6, 2012, in Philadelphia. Airport spokes

 

              Emergency personnel look over a US Airways plane at Philadelphia International Airport, after the plane returned to the airport, Thursday, Sept. 6, 2012, in Philadelphia. Airport spokes
Emergency personnel look over a US Airways plane at Philadelphia International Airport, after the plane returned to the airport, Thursday, Sept. 6, 2012, in Philadelphia. Airport spokeswoman Victoria Lupica says US Airways Flight 1267 returned to the airport Thursday morning as a "precaution." Footage from WCAU-TV showed a person being escorted off the plane by law enforcement officials and police dogs on the tarmac. An FBI spokesman did not immediately comment on the situation.(AP Photo/Matt Rourke)