text: Afghan Opposition Boycotting Election KABUL, Afghanistan - All 15 candidates running against interim Afghan leader Hamid Karzai signed an agreement Saturday boycotting the vote because of what they say is widespread fraud, and say they will not recognize the election results.    The announcement was read out after a meeting of candidates and their representatives at the home of Abdul Satar Sirat, an Uzbek who is an ex-aide to Afghanistan's last king...