Two decades of combat, trillions of dollars spent, tens of thousands of lives lost. It's no wonder the debate over Afghanistan isn't over, even if the war essentially is. Indeed, the Taliban's swift takeover has unleashed a flood of new questions, chief among them: Was it all for naught? Were U.S. efforts a failure? What's next for Afghanistan? And how will an Afghanistan run by a fundamentalist Islamic militant group affect U.S. national security? Five people, representing both sides of the aisle and both sides of the world, share their perspectives in their own words on the Afghanistan war. Swipe through to read what they had to say. #afghanistan