CONCORD, N.H. (AP) — A New Hampshire man has been sentenced to over three years in federal prison for possession of an improvised explosive device. Ryan Cortina, 34, of Somersworth, pleaded guilty in April in a plea agreement with prosecutors. He was sentenced in federal court on Monday. According to court documents and statements made in court, Somersworth police received information from a confidential informant that Cortina had destructive devices at his home and showed him a “grenade” that he had built. Officers executed a search warrant at his home and found five suspected destructive devices in a duffle bag, including an improvised explosive device.