On September 11, New York City Battalion One Fire Chief Joseph Pfeifer lost a brother and 22 of his men when the World Trade Center towers collapsed. Now he's one of the lead firefighters overseeing the identification and tracking of victims -- as well as equipment, evidence, and significant wreckage -- from ground zero.

To fulfill his tragic task, chief Pfeifer relies largely on human resources -- tireless New York firefighters and rescue workers. But he also uses high-tech satellites and wireless handheld technology to do the job that may ease the minds of other people who lost friends and family on September 11. So far, his tracking efforts have benefited tremendously from rugged handheld computers and bar codes made by Symbol Technologies and from global-positioning satellite applications and a real-time tracking database created by Links Point.

These technologies give the fire department an immediate and accurate reading of where each victim was found -- a problem that confounded Pfeifer and his men in the days following the World Trade Center attack. The 16-acre site has been divided into a grid consisting of 75-square-foot blocks designed to make sense of the scene. But the site contains few landmarks or points of reference, and the scene changes daily as more pieces of steel and building debris are removed. Amid the chaos, chief Pfeifer says that noting the exact location of each body is of the utmost importance.

"Knowing where someone died might be a minor detail to other people," says Pfeifer, 45. "But to the families, it's very important."

The Writing on the Wall

It's also important to the ongoing investigation. The teams -- eight firefighters who patrol four quadrants, tagging and identifying items the searchers find -- are able to track findings in real time. By entering a corresponding bar-code number into the tracking system, rescuers can keep tabs on anything found at ground zero. For now, the data is only available to the fire department.

For a week after the towers' collapse, searchers were tagging items and jotting down corresponding information by hand. They often had to guess items' exact location on the scene. By the second week, Pfeifer and his colleagues at the site began searching for a better way to conduct the investigation. "We wanted to learn about technology that could replace our manual methods," he says.

Firefighters use rugged handheld computers to log in evidence at ground zero.

On September 19, the ground-zero team sat down with a number of technology companies, including Links Point, which makes global-positioning satellite software and hardware. Links Point's technology can be accessed through the Symbol Technologies handheld computer that reads bar codes and records GPS coordinates.

Pfeifer quickly realized the benefits of assigning to each piece of evidence a bar code that would signify its GPS coordinates and allow the crew to track items digitally with fewer mistakes and less manual input. "It's far faster and far more accurate," he says about the GPS tracking system. "Plus, we can gather a lot more data than we could if we were doing it all by hand."