(PHILLY) — An olive-complexioned, curly-haired University of Pennsylvania economics professor was deeply focused while scribbling an algebraic equation Thursday night, waiting aboard an American Airlines flight scheduled to take off from Philadelphia to Syracuse, N.Y.
He didn't have time to talk to the passenger next to him - a blond-haired woman wearing flip-flops who appeared to be in her 30s.
His behavior, his looks, and the little that he said to his seatmate apparently frightened her. She passed a note to a flight attendant.
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The next thing that Guido Menzio, 40, knew, the plane had returned to a gate at Philadelphia International Airport. Menzio - who is Italian - was met by what he described as an "FBI looking man-in-black."