The American Jujitsu Association (a source of excellent content about the art)
Reston, VA, Jujitsu School (Your Sensei got his first two black belts in Jujitsu and Combat Sombo)
Gracie Brazilian Jiu Jitsu Academy (a portal to one of the Brazilian Jujitsu systems)
Belt-rank requirements (these are standardized Japanese Jujitsu advancement requirements)
The Sensei’s Professional USGS Web-Site (he teaches for free, so he needed a day-job)
The Sensei’s Academia Profile (since he retired from the US Geological Survey)
The Sensei’s Family Web-Site Great jungle photos! Great plays by Louise! Read about a 102-yr-old survivor of the Battle of the Bulge followed by 6 months as a German POW.
And a Summary of the Interstellar Meteor 1 (“IM1”) Expedition.