A 20-year-old Kansas man tried to detonate a dud of a car bomb at Fort Riley Military Base on behalf of the Islamic State, the Justice Department’s prosecution alleged Friday. Military personnel nabbed John T. Booker Jr., of Topeka, during his attempt to set a bomb off at the Manhattan facility. The suspect chose Fort Riley for its fame and large population of soldiers, according to a statement released by the Department of Justice. Booker is believed to have spent months scheming a terrorist plot and in March finalized his plan to become a suicide bomber. But the botched attack...