A brother and sister have been charged after an explosive device was left outside a gate at MacDill Air Force Base in Tampa this month.
Alen Zheng, 20, and Ann Mary Zheng, 27, were charged Wednesday in separate federal indictments. The sister was arrested upon her return from China, where she had flown with her brother after the threat. Both have U.S. citizenship, U.S. Attorney Gregory Kehoe said during a news conference.