On the eve of the 2004 presidential elections, then-Secretary of State Colin L. Powell secretly attempted to shift U.S. policy on Iran by telling key allies he wanted to offer "carrots" to the Islamic Republic to halt its nuclear ambitions, former U.N. ambassador John R. Bolton writes in his soon-to-be-published memoir. Bolton, then undersecretary of state, says that he worked hard to thwart Powell's plans -- only to discover, to his dismay, that Powell's replacement, Condoleezza Rice, would pursue the same approach in President Bush's second term. Bolton's book, "Surrender Is Not an Option: Defending America at the United Nations...