According to the Washington Post:
A federal judge yesterday blocked a last-minute rule enacted by President George W. Bush allowing visitors to national parks to carry concealed weapons. In her ruling, Judge Kollar-Kotelly agreed that the government's process had been "astoundingly flawed."
She noted that the government justified its decision to forgo an environmental analysis on the grounds that the rule does not "authorize" environmental impacts. Calling this a "tautology," 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 impacts" of the rule.