Thanks to Heidi for alerting me to this. Aldrin was at the National Book Festival, Washington D.C 5 Sep 2015 This has recently appeared on Facebook suggesting it is a new video from July 2018, but it is from 2015: duckduckgo.com/?q=aldrin+washington+national+book+festival+2015 <duckduckgo.com/?q=aldrin+washington+national+book+festival+2015&atb =v108-3&iax=videos&ia=videos&iai=Y4UP6nRMuGs> &atb=v108-3&iax=videos&ia=videos&iai=Y4UP6nRMuGs ====================…