The sex scandal that felled CIA Director David Petraeus widened Tuesday to ensnare the top US commander in Afghanistan, General John Allen, in a suddenly public drama involving a Tampa socialite, a jealous rival, a twin sister in a messy custody dispute, and flirty emails. The improbable story — by turns tragic and silly — could have major consequences, unfolding at a critical time in the Afghan war effort and just as President Obama was hoping for a smooth transition in his national security team.
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