Rescuers in Wyoming have abandoned their 20-day hunt for a missing Minnesota man after concluding that his "most optimistic survival odds have run out".
Grant Gardner was last seen at the end of July, before embarking on a planned three-day hike in the Big Horn National Forest. Alarm bells were raised on August 1, when he failed to return from his trek in the Misty Moon Lake area, where he planned to scale the 13,171ft (4,015m) Cloud Peak.
