At a ceremony commemorating some of the bravest Americans of World War II, President Barack Obama reminded the "greatest generation" how the U.S. military has changed under his command, by slipping in references to immigrants and women. "Rock, I want you to know that Staff Sgt. Melvin Sabillo Martin, who is here today, is following in your footsteps. He just had to become an American first. Because Melvin was born in Honduras, moved to the United States, joined the Army. After tours in Iraq and Afghanistan, he was reassigned to the 82nd Airborne. And Sunday, he'll parachute into Normandy. "Wilson,...