US President Barack Obama shakes hands with Sergeant Johnnie Marshall, Electronic Warfare Specialist, after signing an Executive Order to help US service members and their families make informed decisions about education and protect them from deceptive targeting by educational institutions, after speaking to US troops at Third Infantry Division Headquarters at Fort Stewart in Hinesville, Georgia, on April 27, 2012. AFP PHOTO/Saul LOEB (Photo credit should read SAUL LOEB/AFP/GettyImages)