
Caption
Bucket-wheel excavators mine rare earth materials on Ukrainian soil on February 25, 2025, in the Zhytomyr region of Ukraine. (Kostiantyn Liberov via Getty Images)
USAF (Retired)
USAF (Retired), currently chair of the board of directors of the Stimson Center, is a retired fourstar general who served 39 years in the U.S. Air Fo
USAF (Retired), currently chair of the board of directors of the Stimson Center, is a retired fourstar general who served 39 years in the U.S. Air Force. He retired in 2017 as commander of U.S. Air Combat Command and was
president and chief executive officer of the National Defense Industrial Association prior to joining the Stimson Center.