http://en.wikipedia.org/wiki/Asama-Sanso_incident
http://www.youtube.com/watch?v=dCvRnkWxlyY
http://youtube.com/watch?v=hl7nUVQbcYI
I remember them bombing the front gate of the Yokota Air Base back in 1985 or 86.
The group is no longer a serious threat. Could be a good case study for dealing with the rash of terrorists we see today.