The parade, honoring the Army’s long-planned 250th anniversary celebration and coinciding with Trump’s 79th birthday, is set to step off from the Lincoln Memorial under the threat of stormy weather in Washington and protests around the country tied to a turbulent week of immigration enforcement that has involved military deployment in Los Angeles.

It's among the starkest examples yet of President Donald Trump flexing his role as commander-in-chief since taking office.

Demonstrations are being held at cities across the U.S. on Saturday, ahead of President Donald Trump's military parade celebrating the U.S. Army's 250th anniversary in Washington, D.C.