Home & Family | Politics | Your LifeForty years ago today, the last American combat troops left Vietnam. The events of that day aren’t imprinted on the national consciousness, as are images of overloaded helicopters taking off from Saigon. That evacuation of American personnel and Vietnamese refugees happened two years later, in 1975. Today’s anniversary brings up an embarrassing and troubling set of emotions for some of us who questioned the war long ago. According to the Associated Press, “Forty years ago, soldiers returning from Vietnam were …