"On the news at this time is the question of the hostages," then vice president George Bush noted in his secret diary on November 5, 1986, two days after a Lebanese newspaper broke the first story of the Reagan administration's efforts to trade arms for hostages with Iran. "I'm one of the few people that know fully the details," Bush continued. "This is one operation that has been held very, very tight, and I hope it will not leak." But...