Federal prosecutors say a North Carolina man has been convicted of punching the ambassador of Gabon at a demonstration at that country’s embassy in Washington. Forty-five-year-old Leon Obame of Raleigh was convicted of assault on a foreign official. He faces a maximum of three years in prison. Prosecutors say the assault occurred on Dec. 9 at the embassy’s temporary location on Connecticut Avenue N.W. Authorities say Obame punched Ambassador Michael Moussa-Adamo, knocking him to the ground.