President Biden on U.S. withdrawal from Afghanistan

We no longer had a clear purpose in an open-ended mission in Afghanistan.  After more than $2 trillion spent in Afghanistan, costs that Brown University researchers estimated would be over $300 million a day for 20 years — yes, the American people should hear this... what have we lost as a consequence, in terms of opportunities? ...I refuse to send America’s sons and daughters to fight a war that should have ended long ago.

~ President Joe Biden, August 31, 2021

(as quoted by Jill Kimball, "Costs of the 20-year war on terror: $8 trillion and 900,000 deaths," Brown University, September 1, 2021)