Fifty years ago, I could have tried to stop the Vietnam War, but lacked the courage. On Aug. 20, 1967, we at CIA received a cable from Saigon containing documentary proof that the U.S. commander, Gen. William Westmoreland, and his deputy, Gen. Creighton Abrams, were lying about their “success” in fighting the Vietnamese Communists. I live with regret that I did not blow the whistle on that when I could have. (I wrote about this two years ago: “The Lasting Pain from Vietnam Silence,” republished below.) Why raise this now? Because President Donald Trump has surrounded himself with starry-eyed generals (or generals with their eyes focused on their careers)...