New York Parade Reminds the World of the 30-year Saga of Falun Gong

Elon Musk twitted this morning to hold off his buy of Twitter until the data of bots is accurate; Twitter CEO and Trump spoke out on the acquisition. New York saw the largest Chinese American parade today honoring World Falun Dafa Day. What is WFDD, how was it started, and why it is a story that we should pay attention to?