The past few years have led to record wildfires across the U.S. Decades of suppressing fires has led to overgrown forests, and a warming climate has increased their intensity and frequency. Christopher Booker reports from California on community-led efforts to preemptively set controlled fires, reducing the risk from large out-of-control fires while also restoring the ecological health of the forest. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders