TREE LIGHTS Air Force Airman 1st Class Zach Wertz replaces old rope lights on an outdoor tree display on McConnell Air Force Base, Kan., Dec. 2, 2014. Wertz is an electrician assigned to the 22nd Civil Engineer Squadron. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 861026-U-WUB40-328.jpg Photo Gallery