When Barack Obama arrived in high office he issued the usual politician's pleas that his children were 'off limits' to the media. But lo, how things have changed. Malia, 12, and Sasha, 9, have been wheeled out again as the Obamas determine to play happy families - and Sasha doesn't look to happy about it at all. After the Christmas tree lighting-up, the girls' latest public appearances came in the form of a festive concert in Washington, on another school night.
