• Nagasu wins short program at U.S. championships: Mirai Nagasu narrowly won the short program at the U.S. Figure Skating Championships on Thursday night, edging out two other previous champs. Nagasu, who was the second-youngest winner when she claimed the title in 2008, scored 63.35 with a bewitching and beguiling “Witches of Eastwick” program. That puts her slightly ahead of 2009 winner Alissa Czisny (62.50), who got a measure of redemption after last year’s “heartbreak,” when a poor short program knocked her out of the running for the Vancouver Olympics. Defending champ Rachael Flatt is third at 62.32. The free skate is Saturday night. In pairs, Mary Beth Marley and Rockne Brubaker are in third place after the short program at the U.S. Figure Skating Championships, an impressive result for a couple who began skating together five months ago. Caitlin Yankowskas and John Coughlin won the short program.