The Native Nations Rise March on Washington

Today was the culmination of the Native Nations Rise March on Washington in which thousands converged in Washington, DC to protest against the Dakota Access Pipeline and more.  The march began at the Army Corps of Engineers Office, 441 G St NW, and ended with a rally @Lafayette Square.  For more information, click here.

There has been an encampment on the Mall near the Washington Monument since Monday.  

In 1978, hundreds of Native American activists marched from San Francisco to Washington, DC over five months, calling it the 'Longest Walk'.  The photo above is an image of the 1978 encampment near the Washington Monument.  There was also a tipi on the grounds of the White House, according to a history of AIM.  That same year, Women of All Red Nations (WARN) was founded.

In 1968, the American Indian Movement was founded in Minnesota, propelled by "extensive police brutality."  Learn more here.  

I'm seeking information about Native Americans in DC in 1968.

Source:  Library of Congress, Warren K. Leffler, photographer, 11 July 1978.