Bomb technicians may be less than an hour from entering the apartment of James Holmes, alleged Colorado killer, in order to remotely detonate or defuse the improvised explosive devices believed to be inside. Investigators told CBS that Holmes had filled his apartment with 30 rubber shells filled with a smokeless powder, one of which is being examined by FBI explosives experts. Several tripwires appear to be tied to containers of liquid spread around the apartment. There are about 100 personnel on the scene, from FBI technicians to firefighters to chemists. Authorities have cleared the immediate area.