WASHINGTON : Although President George W. Bush's administration reacted with surprise to Pakistan's nuclear assistance to Iran, the Islamabad government warned the United States that such technology transfers might have occurred as early as 14 years ago, two former Pentagon officials say. The threat was conveyed in January 1990 from Pakistan 's top general to the administration of Bush's father, but the information doesn't appear to have made its way to President Bill Clinton's administration when it took office three years later, according to interviews by The Associated Press. In recent weeks, evidence has emerged that Pakistani nuclear aid to...