The column in the New Republic, described as being penned by a U.S. soldier in Iraq, is filled with tales of petty, stomach-churning behavior. The "Baghdad Diarist," writing under the pseudonym Scott Thomas, says he was "shocked by my own cruelty" as he recounts soldiers getting their kicks by running over dogs with Bradley Fighting Vehicles and playing with Iraqi children's skulls taken from a mass grave. But now the liberal magazine, responding to questions raised online by the Weekly Standard and other conservative Web sites, is looking into whether the soldier's account in this and two earlier columns can...