Forgot to link article as an excerpt. Just click Attac Report link in the original post and it will take you to the diagram--HUAC
Just in case.. there is also an excellent resource provided by David Horowitz, http://www.discoverthenetwork.org/
Discover the Network tracks and documents all aspects of several categories of domestic anti-U.S. groups.
I think Discover the Network is a good supplement for the groups covered by www.attacreport.com and it includes many more groups in the several categories.
Here is something I did not know about Weather Underground and the Bill & Hillary Clinton connection:
"Weather Underground member Susan Rosenberg, implicated in the Nyack robbery, and Linda Evans, at different times wanted on a number of criminal charges, were apprehended carrying 740 pounds of explosives in 1985. Both acknowledged that the explosives were to be used to carry out additional bombings. Rosenberg was given 58 years in prison, Evans 40; President Bill Clinton, in two of a number of highly suspicious late-term pardons, pardoned both women."