Watch This Before You Hike In National Parks - Part 2

What would make a college-aged woman strip completely naked, abandon her shoes, and walk barefoot into one of America's most dangerous forests? In June 2013, that's exactly what Anu Kelly did - and for 10 years, despite a $275,000 search operation covering millions of acres, not a single trace of her has ever been found. No clothing. No remains. Not even the small fanny pack she carried. It's as if she simply evaporated from the face of the earth. But what really happened in those woods?