South Florida emergency responders prepare for attacks in 'Operation Heat Shield'

Hundreds of volunteer victims, hostages came out for operation

MIAMI – South Florida emergency responders prepared for the worst Saturday to make sure they're ready to save lives. Training went long into the night.

Crews spent an entire Saturday in several different scenarios, making sure they are ready when they're needed.

As night fell, Marlins Park became ground zero for first responder training -- a mock terrorist attack happening in what was supposed to be an all-star game.

Police and rescue crews descended on the sports venue for "Operation Heat Shield."

More than a dozen joined together in a day of terror training that has never been seen before in the South Florida area, learning in a very realistic setting and practicing communication.

The premise was a staged coordinated attack, sleeper cells coming to life throughout Miami, with an attack at the Miami-Dade Government Center, another on board an airliner at Miami International Airport and one at the Coast Guard station.

Hundreds of volunteer victims and hostages came out for the operation.

Officials said the training was planned for more than a year, but with recent attacks in Paris, it only strengthened their purpose.