I was just told by my friend at AP that two world-renowned photojournalists have been killed covering combat in Libya. Chris Hondros and Tim Hetherington have been killed, and Andre Liohn has been injured. We all know Hondros' pictures from the Iraq War in particular. He took the famous photos, illuminated by rifle lamps, of the one-of-many incidents in which Iraqi civilians in a car were killed at a U.S. checkpoint. Hetherington is a World Press Photo winner and co-director of the film "Restrepo." This is really sad news to me. I want to take a moment to think of the journalists putting themselves in life-threatening situations so that we have the raw material necessary to be informed. * Note: Hondros was initially reported dead, but the most current updates say that he is gravely wounded, and there has been no mention of Liohn beyond the initial report.