The search continues in Yosemite National Park for missing hiker George Penca, who was last seen at the top of Yosemite Falls on Friday, June 17, 2011. Due to the fact that the area has been thoroughly searched by personnel and dogs, the terrain is rugged and steep, and no clues have been found, search efforts are being scaled back. https://www.nps.gov/yose/learn/news/pencasar2.htm