The Fifth and Mission team is not producing any new episodes this week. Instead, we are sharing some of our favorite past episodes that exemplify what we've loved about making this show. Today's pick is from producer Keith Menconi. Wildland firefighting has long been recognized as dangerous, dirty work. Now, there is growing evidence that it can also cause serious long-term health problems. Chronicle reporter Julie Johnson spent six months investigating the impacts of wildfire smoke on firefighters, and spoke to a dozen men and women diagnosed with grave diseases who all suspect that smoke was a factor. She tells host Cecilia Lei that for decades fire agencies have struggled to provide meaningful protection for their workers, but that progress could be coming. | Unlimited Chronicle access: sfchronicle.com/pod Got a tip, comment, question? Email us: fifth@sfchronicle.com Learn more about your ad choices. Visit megaphone.fm/adchoices