(Credit: AP Photo/Cliff Owen, File) It took 14 years, but now we have an answer. It was March 2003, the invasion of Iraq was underway, and Major General David Petraeus was in command of the 101st Airborne Division heading for the Iraqi capital, Baghdad. Rick Atkinson, Washington Post journalist and military historian, was accompanying him. Six days into a lightning campaign, his division suddenly found itself stopped 30 miles southwest of the city of Najaf by terrible weather, including a blinding dust storm, and the unexpectedly “fanatical” attacks of Iraqi irregulars. At that moment, Atkinson reported, “[Petraeus] hooked his thumbs into his flak vest and adjusted the weight on his shoulders.