Firefighters will use their recently-acquired Mobile Emergency Response Vehicles (MERVs) to travel through the tunnels. MERVs, which were used during the 2005 bombing of the London Underground, can reduce the time it takes first-responders to reach underground victims from 45 minutes to 4 minutes.
The exercise will take place between 9 AM and noon. The $1.2 million in funding for it came from a federal Homeland Security grant.