Under Chertoff's leadership, the Department of Homeland Security constructed hundreds of miles of fencing along the border between the United States and Mexico. On April 8, 2008, Chertoff issued waivers allowing the Department of Homeland Security to "bypass environmental reviews to speed construction of fencing along the Mexican border". "The New York Times" reported that pursuant to the Secure Fence Act of 2006, "the department was authorized to build up to 700 miles of fencing along the 2,000-mile Southwest border, where most illegal immigrants cross". Congress had granted Chertoff waiver authority in 2005, but the "Times" described his actions as an expansion of his waiver authority. According to "Times" columnist Adam Liptak, Chertoff's action excluded the Department of Homeland Security from having to follow laws "protecting the environment, endangered species, migratory birds, the bald eagle, antiquities, farms, deserts, forests, Native American graves and religious freedom." In an editorial, the "Times" criticized Chertoff for his use of waiver authority, stating: "To the long list of things the Bush administration is willing to trash in its rush to appease immigration hard-liners, you can now add dozens of important environmental laws and hundreds of thousands of acres of fragile habitat on the southern border."