Iran has made threats against Fort McNair, a U.S. Army post located in Washington D.C. — the U.S. capital, and against the Army’s vice chief of staff, two senior U.S. intelligence officials said. They said communications intercepted by the National Security Agency in January showed that Iran’s Revolutionary Guard discussed mounting “USS Cole-style attacks” against the Army post, referring to the October 2000 suicide attack in which a small boat pulled up alongside the Navy...