With a stern tone, veteran firefighter P.J. Lingley described fire-shelter etiquette. “We don’t joke about [fire shelters],” Lingley said. He was speaking as a volunteer instructor to about 100 students taking Firefighter Training, the most basic course offered by the Arizona Wildfire and Incident Management Academy (AWIMA). The nonprofit academy kicked off its 16th year of operation in Prescott on Saturday, March 10, and wrapped up the session on Friday, March 16. Fire shelters have been used by firefighters since the 1970s, but the tragedy of 2013, when 19 firefighters died in the shelters that were expected to protect them, remind us of the significance of these shelters, as well as their limitations.