Cost of America's longest war: Thousands of lives, trillions of dollars

Here is a look at the US-led war in Afghanistan - which is America's longest war, by the numbers, as the last Americans deployed there departed.

US military planes have carried the last US service members and diplomats from Kabul's airport, ending America's longest war. Ordinary Americans closely watched the chaotic withdrawal from Afghanistan, as they did the start of the war nearly 20 years ago, in the weeks after the 9/11 attacks. But Americans often tended to forget about the Afghanistan war in between, and it received measurably less oversight from Congress than the Vietnam War did. But its death toll for Afghans and Americans and their NATO allies is in the many tens of thousands. And because the US borrowed most of the money to pay for it, generations of Americans to come will be paying off its cost, in the trillions of dollars.