Monitoring America

The unit practices WMD scenarios constantly. But in real life, the crew uses the equipment very little: twice a year at NASCAR races in nearby Bristol to patrol for suspicious packages. Other than that, said Capt. Matt Hayes, several times a year they respond to hoaxes.

The fact that there has not been much terrorism to worry about is not evident on the Tennessee fusion center's Web site. Click on the incident map, and the state appears to be under attack.

Red icons of explosions dot Tennessee, along with blinking exclamation marks and flashing skulls. The map is labeled: "Terrorism Events and Other Suspicious Activity.

But if you roll over the icons, the explanations that pop up have nothing to do with major terrorist plots: "Johnson City police are investigating three 'bottle bombs' found at homes over the past three days," one description read recently. ". . . The explosives were made from plastic bottles with something inside that reacted chemically and caused the bottles to burst."

Another told a similar story: "The Scott County Courthouse is currently under evacuation after a bomb threat was called in Friday morning. Update: Authorities completed their sweep . . . and have called off the evacuation."

Nine years after 9/11, this map is part of the alternative geography that is Top Secret America, where millions of people are assigned to help stop terrorism. Memphis Police Director Godwin is one of them, and he has his own version of what that means in a city where there have been 86 murders so far this year.

"We have our own terrorists, and they are taking lives every day," Godwin said. "No, we don't have suicide bombers - not yet. But you need to remain vigilant and realize how vulnerable you can be if you let up."

Staff researcher Julie Tate contributed to this story.