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In this photo provided by the Utah County Sheriff's Department showing Kai Christensen, 21, of Provo, who was booked Saturday into the county jail for investigation of misdemeanor reckless endangerment. A Forest Service law enforcement officer with military experience discovered trip wires for the booby traps at entrances of a crude shelter made of dead tree limbs in Provo Canyon, said Utah County sheriff's Sgt. Spencer Cannon. (AP Photo/Utah County Sheriff Department)

Deadly traps found on popular Utah trail

A deadly booby trap rigged along a popular Utah trail could have killed someone if they had tripped a ground wire set up to send a 20-pound, spiked boulder swinging into an unsuspecting hiker, authorities said April 23.