This day in history
2002, 2007, 2012, 2017, 2021.
#20yrsago Roman chariots responsible for Space Shuttle design constraints https://web.archive.org/web/20021004033340/https://benhammersley.com/archives/001404.html
#20yrsago Science fiction writers help the CIA https://www.wired.com/2002/10/i-fought-the-future-for-the-cia/