DETROIT (AP) — A 19-year-old man was arrested after spending months planning an attack on a U.S. Army site in suburban Detroit, authorities said Wednesday.
The man was planning a mass shooting at the Army’s Tank-Automotive & Armaments Command in Warren, commonly known as the Detroit Arsenal, on behalf of the Islamic State group, the U.S. Attorney’s Office said.
But he didn’t know that he had been sc…