Street lights reflect off Heritage Lake on Ellsworth Air Force Base, S.D., Jan. 28, 2012. Ellsworth has been experiencing an unusually warm winter season with an average temperature of 41 degrees and 1.6 inches of snow, compared to the 32 degrees and 5.2 inches of snow for the month of January 2011. Airmen should be advised that going out on the ice for any reason is prohibited. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)