Afghan Leader Says Election 'Fair' KABUL, Afghanistan - Afghanistan's first direct presidential election was thrust into turmoil hours after it started Saturday when all 15 candidates challenging interim leader Hamid Karzai alleged fraud over the ink meant to ensure people voted only once and vowed to boycott the results.    But electoral officials rejected the candidates' call to abandon the rest of the balloting, saying it would rob millions of voters of their chance to cast ballots and that they would rule later on the legitimacy of the election...