US NEWS PARKS-GUNS 1 FR

An added sign designating the school in Yosemite Valley a gun-free zone is posted below the residential sign near administrative offices in Yosemite Valley, March 17, 2010. Federal law now allows visitors to carry guns in national parks, but you can?t just slip a loaded pistol into your backpack and take a hike. You will need a concealed weapons permit to carry the loaded gun in the backpack. (Eric Paul Zamora/Fresno Bee/MCT)