As a military-style parade rolls through Washington, DC on Saturday – President Donald Trump’s birthday – millions are expected to take to the streets to form what organizers believe will be the strongest display of opposition to the administration since the president took office in January.

President Donald Trump will celebrate his birthday by taking in a massive military parade. Here's the latest, from how to watch to the parade cost.

The federal government may spend as much as $45 million on the event, which falls on Trump's birthday but officially honors the U.S. Army's 250th birthday