More than three years after the Sept. 11 attacks, the United States is still struggling to understand how al Qaeda gets its funding, how much it earns and where it spends the money, lawmakers heard on Wednesday. Two members of the bipartisan Sept. 11 commission, which investigated the 2001 attacks, told a Senate hearing that U.S. officials and the international community had managed to choke off some of the militant network’s financing, but said stopping the flow of funds had proved impossible.Full Story