Afghans, Western diplomats admit they were taken in by a man who claimed to be Akhtar Mohammad Mansourh. Meanwhile, the Afghan government braces for possible violence as final elections results are set to be released.If it sounded too good to be true, that's because it apparently was. Afghan officials and Western diplomats acknowledged Tuesday that a man claiming to be a senior Taliban leader, who was flown to the Afghan capital in a NATO aircraft for talks earlier this year, was almost certainly an imposter.