Tough Mudder
Airman 1st Class Reymundo Lopez, 56th Equipment Maintenance Squadron, prepares to jump into the Arctic Enema obstacle of the Tough Mudder challenge Feb. 23 in Mesa. The obstacle featured a pit filled with water and ice and is the second obstacle in the Tough Mudder course that has 21 obstacles featured on a 12-mile course. (U.S. Air Force photo/Airman 1st Class James Hensley)