The closed Publix in Sawgrass Village in Ponte Vedra Beach was the site of a special day of training on Wednesday involving "the Rook."
It's 6½ tons of pure bulletproof armor and glass made by Ring Power, a worldwide company that started locally in St. Augustine.
The vehicle helps officers approach a structure without having to be on foot, and they can gain entry to the second story of a house or building without a ladder, enabling them to search from the top down without having to go up an unknown staircase.
"Barricaded subjects, anytime that you might need to get into a building without taking a chance on somebody's life, you have a lot of protection in a Rook," said Kevin Kelshaw, of the St. Johns County Sheriff's Office.
The training activities for SWAT teams and bomb squads was took place at the shopping center State Road A1A.
Only four counties throughout Florida have a Rook. They are St. Johns, Duval, Alachua and Orange counties.