Somber day for sure.
If you ever want to go down the rabbit hole, and I mean *down* the rabbit hole about this and a lot of other things that happened in the 20th century, here is a great video. Long, but it's unbelievably interesting and thought provoking:
https://youtu.be/niTwvtokYf0?si=xkhOPCAZL9n9W0ya