100 faces, 100 hours

(CNN) - As the U.S. observes Memorial Day, CNN is honoring the fallen by spotlighting a U.S. casualty from the Afghanistan and Iraq wars every hour on the CNN.com homepage through the weekend and the holiday. They're from every state and from every branch of the U.S. military. They're 18 years old and 60; they're sons and daughters, mothers and fathers. And they're just 100 of the more than 8,000 U.S. and coalition troops who have died.