An American college student killed Friday during antigovernment violence in Egypt was in the country on an internship to teach English to young children while also improving his Arabic skills, family members said. The American, Andrew D. Pochter, 21, a student at Kenyon College in Gambier, Ohio, was killed in Alexandria during clashes between supporters and opponents of President Mohamed Morsi, the college said. Security officials in Egypt said he was fatally stabbed near the headquarters of the Muslim Brotherhood, which had been set on fire.