Brock explained he and his fellow crewmembers worked to rappel the dogs down a 30-foot pipe to find victims.
"They love it," he said, with his dog, Jack, beside him.
"Lowering is difficult because they are suspended in the air and they wiggle around because it's not natural to be suspended, but their reward is finding the victim."
Other scenarios include terrorist situations in subway stations, movie theaters and restaurants, where teams have to figure out where chemicals are, according to a brochure on the tunnel.
There also is a simulated Afghanistan cave where weapons are hidden.
In the final stage is a collapsed parking garage where mannequins are trapped under concrete blocks and inside wrecked cars.
Lt. Col. Bill Annie, with the Air National Guard, said teams have a methodical approach that governs the process in and out of the tunnel.
"They do everything from setting up command posts to setting up and planning their engagement in the tunnel to anything as simple as monitoring air quality for carbon monoxide," he said. "That's for safety purposes because we don't want the rescuers coming to the location and becoming victims of something that they're trying to minimize."