Police arrested a Sioux City boy on terrorism charges Monday. Authorities say the 15-year-old boy had planned a Columbine-style attack like the one in which Colorado students were killed in 1999. Police haven’t released the name of the West High School student but say the boy had been the subject of an investigation since January. They found no weapons or other threatening materials when they searched his locker. He’s been turned over to juvenile authorities. Police Sergeant Tony Sunclave said the teenager admitted he’d planned an attack and was infatuated with Eric Harris and Dylan Kliebold, the Columbine students who killed 12 classmates and a teacher and then committed suicide at their school in Littleton, Colorado, five years ago today.