The Association of the U.S. Army hosted its largest event of the year from Oct. 21 to Oct. 23, welcoming industry, Army officials and foreign military leaders to the Walter E. Washington Convention Center.
Donny Boyd, of the Montgomery County bomb squad, operates a robotic vehicle used for disposing of explosives, at the Mistral Group’s booth. The company makes tool kits that bomb squad robots can use.Jeffrey MacMillan/For The Washington Post
President Trump and first lady Melania Trump lit the National Christmas Tree for the first time. The program was hosted by television personality Kathie Lee Gifford and actor Dean Cain and featured performances by the Beach Boys, Jack Wagner, Wynonna Judd, Craig Campbell and others.