Photo essay | Lakenheath Airmen build partnerships in Bulgaria Published May 20, 2010 By Airman 1st Class Tiffany M. Deuel 48th Fighter Wing Public Affairs GRAF IGNATIEVO AIR FORCE BASE, Bulgaria -- Airmen from the 48th Fighter Wing, RAF Lakenheath, England and Airmen from the Bulgarian air force have been participating together in Sentry Gold, a joint-training exercise here. The exercise is designed to provide both air forces the opportunity to learn from each other and increase their respective NATO interoperability. View the slideshow.