the 1921 Tulsa Race Massacre 

                                  hats off to President Biden acknowledging the horrific massacre

https://www.pbs.org/newshour/politics/watch-live-biden-honors-victims-of-tulsa-race-massacre

441,  Twosday,  1  6. 21

https://www.whitehouse.gov/briefing-room/speeches-remarks/2021/06/02/remarks-by-president-biden-commemorating-the-100th-anniversary-of-the-tulsa-race-massacre/