An Airman died May 24 while deployed to Camp Arifjan, Kuwait, in support of Operation Inherent Resolve the Pentagon announced May 25. Maj. Stephen Khou, 36, died in a non-combat related incident, the Department of Defense said in a statement. The incident is under investigation. 
Ash Carter, who served as the 25th Secretary of Defense from 2015 to 2017, during the presidency of Barack Obama, died Oct. 24 at the age of 68. Carter served in national security roles and held numerous academic research, teaching, and leadership positions.