Defense Meeting Secretary of Defense Lloyd J. Austin III, Army Gen. Mark A. Milley, chairman of the Joint Chiefs of Staff, and Celeste Wallander, assistant secretary of defense for international security affairs, host the fourth Ukraine Defense Contact Group conducted virtually from the Pentagon, July 20, 2022. SHARE IMAGE: Download Image: Full Size (1.25 MB) Tags: Leaders, Austin, Defense Secretary, Ukraine Response Photo By: Chad McNeeley, DOD VIRIN: 220720-D-TT977-0129W.JPG Photo Gallery