Not just anyone could become a member of the Granite Mountain Hotshots.
The elite firefighting force -- which lost 19 of its 20 members in a wildfire on Sunday -- required candidates to complete a boot camp-style test to prove they were in peak physical condition.
Would-be members had to run 1.5 miles in 10 minutes and 35 seconds, complete 40 sit-ups in 60 seconds, 25 push-ups in 60 seconds, and seven pull-ups.
“We believe in rigorous physical and mental training, which allows us to perform at the optimum level in any location and under any circumstances,” the Hotshots' website said. “We are routinely exposed to extreme environmental conditions, long work hours, long travel hours and the most demanding of fireline tasks. Comforts such as beds, showers and hot meals are not always common.”
Its members trained by running, hiking, yoga, doing core exercises and weight training.
"Problem solving, teamwork, ability to make decisions in a stressful environment and being nice are the attributes of our crewmembers," the site added.
Members received at least 80 hours annually of "critical training." Founded in 2002, the Hotshots included "dedicated people of varying age and diverse backgrounds."
The Prescott, Ariz.-based crew had battled blazes in New Mexico and Arizona in recent weeks.
Mary Rasmussen, a spokeswoman for the Prescott National Forest, said the Hotshots were involved in dealing with the Doce wildfire near Prescott for about five or six days from June 18.
The firefighters working the blaze were “very successful in putting the fire out even though there were several hundred homes threatened,” Rasmussen said.
“That fire was much different in the sense that there were no structures lost, no lives lost,” she said.
Retired fire chief Gary Whitworth said that firefighters regularly find themselves situations they’ve never faced before.
"When you’re caught in one of these fast-moving wildfires, with these extreme temperatures, things would have been bursting into flames spontaneously," said Whitworth, who spent more than three decades tackling blazes in the U.K.