(By Robert F. Turner, co-founded the Center for National Security Law at the University of Virginia School of Law) Four decades ago this week, in what was then Saigon, I was trying to facilitate the evacuation of orphans as North Vietnam’s armed forces approached the city. I had left the U.S. Army after two tours in Vietnam and had returned to do what I could to help as America fled a war—a fight for freedom—that it had shamefully chosen to forfeit.