This Friday, April 13, 2018, photo, shows a Waldos 420 flag from 1972 made by a classmate at San Rafael High School, at a bank vault in San Francisco. Friday is April 20, or 4/20. Thats the numerical code for marijuanas high holiday, a celebration and homage to pots enduring and universal slang for smoking. And five Northern California high school stoner buddies widely credited with creating the shorthand slang for getting high nearly 50 years ago now serve as the day's unofficial grand masters. (AP Photo/Eric Risberg)
