Social Network Still #1 At The Box Office The enormous drawing power of Katherine Heigl, Josh Duhamel and a crapping baby couldn’t best the seething cauldron of ambition and computer programming at the core of The Social Network , as David Fincher’s latest edged out a win to top the US box office charts for a second week in a row with $15.5 million across the weekend. The Duhamel/Heigl comedy Life as We Know It still managed to survive some very mixed reviews to take second place, scoring $14.6 million. That meant Disney’s true-life horse drama Secretariat had to make do with third place, though we doubt it’ll be off to the glue factory just yet, with a decent if unspectacular $12.6 million. Legend of the Guardians: The Owls of Ga’Hoole saw its wings clipped very slightly, slipping down from second to fourth, but it still added $7 million to its running total, which now stands at $39.4 million. The top five was rounded out by the week’s worst reviewed film, as Wes Craven’s My