U.S. Air Force Gen. Mike Holmes, the commander of Air Combat Command, and U.S. Air Force Gen. Arnold W. Bunch Jr., the commander of Air Force Material Command, both sign a memorandum between the two major commands during the Technology and Acquisition Sustainment Review conference Jan. 29, 2020, at Joint Base Langley-Eustis, Virginia. The two-day conference allowed for senior leaders to discuss current challenges the Air Force faces and strategize for potential future conflicts. (U.S. Air Force photo by Master Sgt. Daryl Knee)