Katie Couric's Notebook: George Carlin
When George Carlin died yesterday, at 71 from heart failure, the world lost one of its quirkiest, and bravest, comedians.
Video: He'll go down in history for challenging taboos - most famously, the "Seven Words You Can Never Say On TV." And because of Carlin, eventually the Supreme Court ruled that, in fact, you really couldn't say them.
For more, just click on the monitor.