It's difficult for an American president to govern through nuance, especially when it's necessary to persuade a majority of the people that certain actions are essential for national security. And effective persuasion usually requires clarity.
That's how you arrive at President George W. Bush's stark formulation "You're either with us, or you're with the terrorists" after Sept. 11, and much of what sprang from it.
Many school safe rooms, like this one inside Jeffries Elementary in Springfield, Mo., also serve as gymnasiums. Constructed with a $1.6 million grant from FEMA, which covered 75 percent of the cost, the shelter can hold more than 500 people — enough to accommodate all the school's students and employees.
George Briant, shown here in an undated photo and in 2004, recalls Nov. 11, 1918, the day the war ended and the guns fell silent: "You looked like you were in a new land; you couldn't believe that everything is quiet".
Ten years ago, writer Richard Rubin set out to talk to every living American veteran of World War I he could find. It wasn't easy, but he tracked down dozens of centenarian vets, ages 101 to 113, collected their stories and put them in a new book called The Last of the Doughboys. He tells NPR's Melissa Block about the veterans he talked to, and the stories they shared.