BOULDER, Colo. Authorities say a Marine who is missing after reportedly injuring his head while hiking in Colorado's Eldorado Canyon last week staged his disappearance. Boulder County officials say they're still looking for 21-year-old Lance Hering, who was back at Camp Pendleton, California, after being on leave from Iraq. They say they've arrested Hering's friend, 20-year-old Steve Powers, for investigation of allegedly making a false report. Authorities say they became suspicious when they re-interviewed Powers about his August 29th hiking trip with Hering. They say he eventually confessed that the disappearance was staged and that Hering was avoiding his return...