LA CROSSE, Wis. -

First responders fully geared up in SWAT gear get a hands-on lesson in an active shooter situation.

The police officers, firefighters, and paramedics spent four days in an intensive training program to learn how to handle the most stressful situations.

It wrapped up on Sunday with three active shooter scenarios.

The first took the group into an apartment building Western Technical College will be tearing down for its expansion projects in the near future.

The situations called for a gunman opening fire in the apartment, injuring several people.  The students had to use their training to control the situation and save as many lives as possible.

"The training just becomes somewhat instinctive," says Jay Clark of Tri-State Ambulance, "the harder you train and the more realistic conditions builds that confidence and builds that foundation to step back on."

"They know what to do in certain situations that if someone needs life saving care, the police officer can provide that just as well as the paramedic," says Chad Stiles, the tactical EMS instructor teaching the course.

The classes really started expanding after a string of tragedies hit the nation, including Sandy Hook and the Aurora Theater Shooting.

"There are certain injuries that can kill people in a short amount of time, we're talking minutes," says Stiles.

It gives the students all the preparation they need, so if the unthinkable happens, they'll be ready.

"A lot of repetition, a lot of training, over and over so it becomes almost a muscle memory," says Clark.

Sunday's scenario was one of six throughout the state this year.

It costs about $25,000 to put on the training, which is funded through a state grant.