TINKER AIR FORCE BASE, Okla. -- Senior Airman John Wilson, 552nd Aircraft Maintenance Squadron, prepares an E-3 AWACS at Tinker in 2012 for its first flight since the plane was upgraded with the Block 40/45 modification. Hanscom’s program office is the lead integrator and recently met a significant milestone for the upgrade, which is the biggest in AWACS history, replacing mission computer systems and infrastructure with modern, user-friendly and net-centric advancements. (U.S. Air Force photo/Margo Wright)