WASHINGTON, Mar 19, 2009 (UPI via COMTEX) -- A federal judge in Washington Thursday blocked enforcement of a Bush administration rule allowing people to carry loaded concealed weapons in national parks. The rule, filed toward the end of former President George W. Bush's second term, reversed a 25-year-old U.S. Department of the Interior policy requiring that guns be kept unloaded, dismantled or locked up in national parks, except in areas designated for hunting and target practice.