The Difference Between a Mass Murderer and a Serial Killer

Yesterday we were all horrified by yet another incident of senseless murder in our country. This time, a 48-year-old man named George Sodini walked into a neighborhood gym just outside of Pittsburgh with at least two handguns hidden in his gym bag. He walked into an aerobics studio, opened fire, and left four people dead and at least a dozen injured before killing himself. A review of his recent internet postings show that Sodini was despondent with his life and had been planning this heinous a