Target finally booted its CEO but any new CEO will face more problems than just the aftermath of a giant credit-card breach. What's a new CEO to do when the stylish discount store is losing sales to people who never go in a store? Plus, right when it seems that we need computer security more than ever, Symantec's executive announces in the Wall Street Journal that "antivirus is dead." Stacey Vanek Smith reports on the demise of antivirus as a computer security measure and what is taking its place. Also, new reports from the Center for American Progress and the National Education Association say U.S. teachers are nowhere near as radically diverse as their students. Almost half the students attending public schools are minorities, yet fewer than 1 in 5 of their teachers is nonwhite. What is causing this "diversity gap"? How important is it? And, what can be done to narrow it?