The New York Times once labeled William Kunstler "America's most controversial lawyer."

What earned him that distinction was his defense of the so-called "Chicago Seven,"  a group of young radicals who tried to disrupt the 1968 Democratic National Convention in Chicago.

But the Chicago Seven were hardly Kunstler's most controversial clients. He also represented clients ranging  from Jack Ruby to U.S. Marine and Russian spy Clayton Lonetree, to the man known as The Blind Sheikh, the man behind the World Trade Center bombing in 1993.

I met William Kunstler in 1994, when he wrote his autobiography, a book titled My Life As a Radical Lawyer.