I remember back in the late 1980’s, a friend of mine became a smoke jumper after getting out of the service.

SEQUOIA NATIONAL PARK, Calif. — On the hillside above Evelyn Lake, deep in the southern Sierra Nevada, it was surprisingly easy to tell time: precisely at noon, a loud whoop echoed amid the black-flecked granite and dust, signaling lunch hour for the 17-person crew repairing the trail to the lake.
— The New York Times