This Friday, April 13, 2018, photo shows a number of photos from the early 1970s showing the Waldos that are stored in their bank vault in San Francisco. Friday is April 20, or 4/20. That’s the numerical code for marijuana’s high holiday, a celebration and homage to pot’s 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. (Eric Risberg/AP Photo)