Washington saw its biggest military parade in decades.  
Tanks and vehicles rolled through the streets, marking the Army's 250th anniversary.  
Nearly 7,000 troops joined, coinciding with Trump's 79th birthday.  
He got a 21-gun salute and a crowd singing "Happy Birthday."  
Meanwhile, protests erupted nationwide.  
In D.C., marchers headed to the White House, demanding Trump's removal.  
L.A. police used smoke or gas to disperse "No Kings" demonstrators.

Wow, the parade was epic with tanks and cheers, and Trump’s birthday bash looked like a blast with all that love and celebration.