Courtesy photo Air Force Staff Sgt. Marco Kalkbrenner pins Airman 1st Class Ivan Kalkbrenner, his younger brother, upon completion of technical training for security forces. Marco pinned his brother in the same spot his father pinned him to continue the tradition. Courtesy photo SHARE IMAGE: Download Image: Full Size (0.05 MB) Photo By: Pins Airman VIRIN: 180425-O-ZZ999-005.JPG Photo Gallery