2021.01.18 21:03:51 (1351259023660642304) from Daniel J. Bernstein:
A long time ago, August 2019, the CHES conference was in Atlanta (changing venue at the last moment to the Westin because the Sheraton had a Legionnaires outbreak, which seemed terrifying at the time). Conference outing was to MLK National Historical Park: https://en.wikipedia.org/wiki/Martin_Luther_King_Jr._National_Historical_Park