John Glenn: Celebrating a Life of Service (VIDEO)

COLUMBUS, Ohio -- Mourners who braved cold and icy roads packed an Ohio State University auditorium Saturday for a memorial service for space pioneer John Glenn as his casket advanced through the center of the his home state's capital city in a somber processional.Roughly 2,500 people gathered at Mershon Auditorium for a memorial service called "a celebration of life" for the former fighter pilot, astronaut and longtime Democratic U.S. senator from small-town Ohio.Democratic Vice President Joe B