Oil.
How loving stupid do you have to be to believe this? I mean, you really have to put no effort whatsoever into a thought process to produce this type of dumbstuff answer.
1. The government does not directly control the trade of Oil. Not sure if you know this, but the US is a Capitalist society. Companies like Mobil or BP decide where to put drilling rigs.
2. Most of the Oil located in the Middle East is not in Afghanistan, it's in Saudi Arabia - a country that we're not at war with and have decent economic ties to.
3. If we're after resources then we'd be fighting a war of conquest, which isn't happening. Our soldiers are specifically being deployed to put down insurrection and combat guerrilla fighters. We're actually working together with the Afghan military, not trying to take over the country - but that doesn't matter anyway because OUR government doesn't loving control where private corporations put their loving structures in foreign countries.
Just put some thought forward, just a little. Five seconds worth, minimum. Ask yourself "Is this a reasonable post? Is this idea entirely implausible? Am I mentally deficient?" before hitting "post".