I think we are well past the moment where it should have dawned on someone to start withdrawing U.S. troops from Afghanistan over a year ago, but oh well. This is just another reminder of how far we need to go before American foreign policy starts to look normal again.
We are more than capable of supplying our forces, but it is significantly cheaper to truck stuff in. This added expense pours on the folly, in other words. The folly of trying to build a nation for people who don't want it, the folly of putting a tens of thousands of American troops in the middle of a land-locked country in Asia, and the folly of thinking the Taliban aren't prepared to destroy more trucks--this is what we're dealing with.
America needs to leave Afghanistan, and soon. It's over. It's all over but the shouting.