Afghan war by the numbers

$2,700,000,000,000 - cost

4,000,000 - Afghans displaced within country

2,700,000 - Afghans fled from Afghanistan

68.000 - Afghan soldiers killed

47,200 - Afghan civilians killed

3,800 - U.S. contractors killed

2,442 - U.S. soldiers killed

1,144 - Other coalition soldiers killed

444 - Aid workers killed

72 - Journalists killed

20 - Years war has lasted

0 - Chances of U.S. preventing Taliban from

re-assuming power after we leave

Worth it?