October 21: Forrest Gump

Oct 21 1967: 70,000 demonstrators came to Washington, D.C. to "Confront the War Makers." 

The biggest rally was held at the Lincoln Monument on the D.C. Mall. During the afternoon, people lined the reflecting pool and listened to speeches by Dave Dellinger and Dr. Benjamin Spock...  

After the speeches, about 50,000 people set off to exorcise the Pentagon. The brainchild of Abbie Hoffman...

The plan was for people to sing and chant until it levitated and turned orange, driving out the evil spirits and ending the war in Viet Nam. 

By the way, it was a year later that Abbie Hoffman was arrested in Washington DC for wearing a shirt that resembled the design of an American flag.  "I wore the shirt because I was going before the un-American Activities Committee of the House of Representatives, and I don’t particularly consider that committee American, and I don’t consider that House of Representatives particularly representative. And I wore the shirt to show that we were in the tradition of the founding fathers of this country.”

Who knows, maybe he wore one in 1967 too. Or maybe it's a bit of poetic license on the part of the filmmakers.  If you want to dig into all this yourself, one place to look would be Jo Freeman's "Levitate The Pentagon" page, from which I plagiarized a bunch of the information in this post.