WASHINGTON - Richard Clarke, the man who threw elbows and banged heads together to get things done under four American presidents, is the last person friends and colleagues expected to go public. For decades he was the ultimate inside operator, the person who knew how to tackle the toughest national security problems and overcome bureaucratic inertia with behind-the-scenes guts, arrogance, smarts and hard work. But writing a book and testifying to an official commission with scathing tales of miscalculations, failures and infighting at the highest levels of government? No way. "This really isn't Dick," said Steven Simon, who worked with...