BONITA SPRINGS, Fla.- It's been 10 years since an explosion rocked Lovers' Key. A semi-trailer carrying fireworks burst into flames initially killing four workers and injuring two others.

On today's 10th anniversary of the explosion, Bonita Springs firefighters who responded to that call relive that day.

"Dispatch: How many people do you have? Caller: Five. Five. Dispatch: Are they all conscious, Loni? Dispatch: Are they all conscious? Caller: No, no it's bad."

"It's one of those days I will not forget, fire works took on another meaning that day," said Lt. Richard Scott.

It was a call for help from a scene of destruction, difficult even for a firefighter.   While setting up a firework display, something went horribly wrong.

"It was pretty unbelievable. I had never seen anything to that extent before, I have not been in the military, so I have not seen that kind of devastation, that kind of explosion," said Lt. Scott.

A truck loaded with fireworks were accidentally detonated at Lovers Key State Park.

"This is the first time I went on a call of that magnitude with fireworks involved and several casualties," said Lt. David Brewer.

"There was a semi tractor trailer there, there was nothing left of it except the bottom axle, you couldn't even tell it was a truck. I believe there was a cab on the truck, but again almost gone," said Lt. Scott.

Firefighters say pulling up on this call is something they'll never forget

"It just looked like a war zone, without getting into to much detail, everything was just flattened; It basically looked like a big explosion," said Lt. Brewer.

Cary Coburn was a probationary firefighter at the time and relives the events that took place July 3, 2003.

"You see a big column of smoke, it's basically your first fire and explosion; It's basically just nerves. It was the first time I had seen people that had passed, a couple bodies on the ground," said Coburn.

The Bonita Springs Fire Department tells us the actual cause of the explosion was never determined. A fifth person later died at the hospital.