(Portland, OR)  --  The parents of a 13-year-old girl are suing American Airlines after their daughter was allegedly sexually assaulted by another passenger.  The teen was on a flight from Dallas to Portland last month and claims she was repeatedly touched by a 26-year-old man who'd been drinking.  Chad Camp was arrested upon landing.  The lawsuit claims the couple paid a 300-dollar "unaccompanied minor fee," and the airline failed to protect their daughter.  They're asking for ten-million dollars.