Police said a man arrested at the scene of President Barack Obama's visit to the city Tuesday was found to be in possession of an unlicensed loaded gun. Richard Terry Young, 62, of 821 Ocean Blvd. in Hampton, was arrested around 9:40 a.m., hours before Obama's arrival, and charged with the misdemeanor crimes of criminal trespass and carrying a loaded pistol without a license. Young was found inside Portsmouth High School, where Obama later in the day held his town hall-style forum. Young was detained by the Secret Service and subsequently arrested by Portsmouth Lt. Corey MacDonald. Young was carrying a pocket knife, police said. A subsequent search of his vehicle, parked on school property, revealed a loaded hand gun, police said.