_A federal judge yesterday blocked a last-minute rule enacted by President George W. Bush allowing visitors to national parks to carry concealed weapons. . . .
_The three groups that brought the suit -- the Brady Campaign to Prevent Gun Violence, the National Parks Conservation Association and the Coalition of National Park Service Retirees -- argued that the Bush action violated several laws.
_In her ruling, [U.S. District Judge Colleen] Kollar-Kotelly agreed that the government's process had been "astoundingly flawed."
_She . . . wrote that officials "abdicated their Congressionally-mandated obligation" to evaluate environmental impacts and "ignored (without sufficient explanation) substantial information in the administrative record concerning environmental imp_acts" of the rule.