LAKE ELSINORE- Calif. (October 8, 2016) - Chief Warrant Officer 3 Jason Arndt, 304th Sustainment Brigade, presents Tough Mudder finishers with their headbands. The Army Reserve is a sponsor for the Southern California Tough Mudder where participants run a basic-training like course over ten miles long with 22 different team obstacles. (US Army photo by Cpl. Timothy Yao)