I thought DOT required fire extinguishers on commercial trucks.
“The brakes had caught and the tire was burning,” said Moreau, who initially fought the fire with a small extinguisher the driver had on board.
http://www.chron.com/news/houston-texas/texas/article/Houston-firefighter-puts-out-truck-blaze-with-beer-5124146.php?cmpid=hpts