Here are the people who performed live at the U.S. Army's 250th anniversary parade and President Donald Trump's unofficial birthday party.

U.S. Army Drill Team The U.S. Army Drill Team, a drill unit known for its precision drill and excellence, serves as “good-will ambassadors,” per the military’s website.

The U.S. Capitol is seen through security fencing, set up on the National Mall, during preparations for an upcoming military parade commemorating the Army's 250th anniversary and coinciding with ...