Rain dampened President Donald Trump's parade to celebrate the U.S. Army's 250th birthday with thousands of troops, 150 vehicles and 50 aircraft in a parade, concert and fireworks.

Preparations are underway for the U.S. Army's parade in Washington D.C., which also falls on President Donald Trump’s 79th birthday.

Spectacle marking Army anniversary – coinciding with Trump’s birthday – comes amid military response to US protests.