A very modified four-wheel-drive buggy takes on the Nemesis II obstacle Thursday, Feb. 24, 2011, along the Patzcuaro's Revenge trail near Las Cruces, N.M., in the annual Chile Challenge off-road rock-crawling event. It was one of the about 200 off-road vehicles registered for this year's Chile Challenge, an event that pits man and machine against rocks, small cliffs and desert trails.