Airman 1st Class Nathan Johnson, 18th Communications Squadron airfield systems technician, receives a registration number from Master Sgt. Thomas Jones, 18th Aircraft Maintenance Squadron first sergeant, for a challenge run fundraiser beginning at the Risner Fitness Center, Kadena Air Base, Japan, Sept. 30. The 6-kilometer,10-kilometer and 20-kilometer runs were hosted by the Kadena first sergeants to support their non-profit program, Operation Warm Heart. More than 300 people registered to participate in the event. (U.S. Air Force photo/Tech. Sgt. Amanda Savannah)