And most importantly, unlike Vietnam, the American people were viciously attacked from Afghanistan, and remain a target for those same extremists who are plotting along its border.

• 与越战相比最重要的区别在于，美国人民受到了来自阿富汗的恶意攻击，并且仍然面临在阿富汗边境地带进行谋划的同一伙极端分子的切实威胁。