CBS’ long-running Face The Nation will expand to an hour in the spring, moderator Bob Schieffer announced to viewers on Sunday. The move will put the half-hour weekly staple on an equal time footing with its competitors. “I cannot remember when I’ve been happier to break a story than I am to tell you this,” Schieffer told viewers. The show has been around since 1954, and news division executives have wanted to extend it program to hour for several years. The 60-minute format will remain in place for 20 weeks through the political conventions next summer. Executives then will make a decision on whether to make the change permanent. Meet the Press on NBC, This Week on ABC and Fox News Sunday on Fox are each an hour.