WSJ's senior political correspondent Molly Ball reports from the parade route, where vintage tanks and other military hardware are rolling down Constitution Avenue in Washington.

WASHINGTON (AP) — Grand military parade in DC marking US Army’s 250th birthday kicks off with tanks, troops and 21-gun salute.

Coinciding with Trump's 79th birthday, the parade will feature tanks, bands and thousands of troops in honor of the Army’s 250th anniversary celebration.

The grand military parade that President Donald Trump wanted for eight years has barreled down Constitution Avenue in Washington with tanks, troops and a 21-gun salute. The

President Trump is hosting a parade celebrating the 250th anniversary of the U.S. Army on Saturday, bringing tanks and soldiers to the streets of Washington, D.C., for the capital's first major military parade in more than three decades.

"It's really fun, and honestly nerve-wracking," said Jonas Chu, an armored vehicle driver who will appear in the Army's 250th anniversary parade.

The day-long celebration of the Army’s 250th birthday coincided with nationwide protests against Trump and military strikes between Israel and Iran that are testing the president’s “America First” resolve.