Unabomber Ted Kaczynski, Sept. 11 conspirator Zacarias Moussaoui and Arizona mass shooter Jared Loughner all have one thing in common: defense attorney Judy Clarke. With her help, all three avoided the death penalty. Clarke, a 1974 Furman graduate, routinely faces an enraged public, top-notch prosecutors and difficult, often disturbed clients. Now, she is likely to face those things again with another high-profile client, alleged Boston Marathon bomber Dzhokhar Tsarnaev. Clarke, who avoids all publicity, was the subject of a profile on the Weekend Edition of National Public Radio.