Several deer cross Twining street on Ellsworth Air Force Base, S.D., Jan. 26, 2011. According to the 28th Bomb Wing Ground Safety Office, deer rarely travel alone, so if one is seen there’s a good chance more are in the area. Drivers should follow posted speed limits and allow enough time to react, if a deer crosses their path. (U.S. Air Force photo/Staff Sgt. Marc I. Lane)