This means the closure was done under President Bush's administration. I have removed the Fox News video because it was very misleading.
Fox News is reporting that an eighty mile strip of Buenos Aires National Wildlife Refuge in Arizona has been closed to Americans because the United States cannot control it. The portion runs along the United States-Mexican border. Apparently, neither United States Fish and Wildlife Service nor the Border Control feel it can control the area as the presence of Mexican narco-militias combined with armed border runners has made the closed area to dangerous to police.
The closure of a portion of the refuge makes it an ungoverned space which the United States claims but has more or less given up on controlling for the time being. Many commentators have blasted Pakistan for being unable to control Waziristan. Some other observers have gone so far to mock Mexico for losing much of its populated northern cities to drug gangs. If these narco-militias use the closed area of the wildlife refuge to either launch raids against the Mexican military or even use it as a base for conducting inter-gang warfare in Arizona, will the United States have any credibility to criticize any other country for not controlling its own lawless groups and territory?