WILMINGTON --Carl Persing's "public display of sexual affection" for his girlfriend on a Raleigh-bound flight last fall -- and threats to a flight attendant who asked him to stop -- landed him in a federal trial, a prosecutor said Monday. Persing, 40, of Lakewood, Ca., is charged with interfering with a flight attendant on the Sept. 15 Southwest Airlines flight from Phoenix. His girlfriend, Dawn Elizabeth Sewell, 40, is charged with assisting him. Flight attendant Frank McCabe, 29, testified Monday that Persing and Sewell sat together in the second row, and that Persing was glassy-eyed. Before takeoff, McCabe said, Persing...