Robert A Paxton, president of the Iowa Community College, resigned this week after an eyebrow-raising picture of him appeared in The Des Moines Register. The photo appears to show him pouring a keg of beer into the mouth of a bikini-clad young woman on his boat. (He says the spigot was not functional.) Two years ago, Amy Gutmann, president of the University of Pennsylvania, came under fire for being photographed at a Hallowe'en party beside a student dressed as a suicide bomber. Presidents must always be on guard in public -- and in private as well -- as one ill-timed photo can ruin an entire career. The Chronicle of Higher Education (subscription required)