“As there are no matters more important than safety and security, Delta people followed procedures to have an unticketed passenger removed from the flight and then apprehended,” the Atlanta-based airline said in a statement. “We apologize to our customers for the delay in their travels and thank them for their patience and cooperation.TSA said that it “takes any incidents that occur at any of our checkpoints nationwide seriously. TSA will independently review the circumstances of this incident at our travel document checker station at Seattle/Tacoma International.”