A Maryland man inspired by the Islamic State group plotted to ram a stolen U-Haul truck into as many pedestrians as possible at a popular convention and tourist destination just outside the nation's capital, federal prosecutors said Monday. The allegation was made in a court filing as prosecutors in Maryland urged a judge to keep the defendant, 28-year-old Rondell Henry, detained on a charge of driving a stolen vehicle across state lines. The police arrested him on March 28 after officers who discovered the stolen truck saw him leap over a security fence. The government's six-page detention motion describes Henry...