Player Embed Code: Download Embed Share Top Army and National Guard Leaders Hold Briefing Defense.gov Jan. 25, 2021 | 24:51 Acting Army Secretary John E. Whitley; Army Gen. Daniel R. Hokanson, chief of the National Guard Bureau; and Army Maj. Gen. William J. Walker, commander of the District of Columbia National Guard, hold a press briefing at the Pentagon, Jan. 25, 2021.