watching a person depart from a mosque in, say, Lodi, Calif., or drive a car from Chicago to Detroit.

Prior to Katrina, the NGA had been used sporadically during domestic crises. Its first baptism of fire came after the 9/11 terrorist attacks, when the agency collected imagery to help in the recovery efforts at the World Trade Center and the Pentagon. But the storm of 2005 triggered NGA activity on a scale never before seen inside the borders of the United States. "Hurricane Katrina changed everything with what we do with disasters," John Goolgasian, the director of the NGA's Office of Americas, told Salon. In New York after 9/11, the NGA had only a handful of people on the ground, but "with Katrina, we put a lot of peopledown in the theater," he said, using a term usually reserved for overseas military battlegrounds. The agency now deploys its staff on a regular basis to hurricane zones and also provides assistance to law enforcement agencies during events such as the Super Bowl, the baseball All-Star Game and political conventions.

On one level, the engagement of the NGA and the U-2 flights over the Gulf Coast during Katrina were commendable efforts to use America's vast surveillance powers for the safety and support of its citizens. But at the same time, the incident apparently marked the first time in history that U.S. intelligence agencies created to spy on foreign countries were deployed to collect extensive information on the U.S. "homeland." Their role during Katrina is just one aspect of an