Most likely OIL has something to do with it!!!
http://www.alt-market.com/articles/1667-get-ready-for-the-death-of-the-petrodollar
Link from comments:
Part 4: (pdf upload-December, 2012)
http://ftmdaily.com/preparing-for-the-collapse-of-the-petrodollar-system-part-4/
Conclusion
In summary, evidence suggests that the U.S. planned to invade Afghanistan even before the tragic events of 9/11. While the reasons are somewhat speculative, the weight of the evidence points to the Talibans obstruction in allowing Western oil companies to build a Trans-Afghanistan pipeline. Eleven years later, the U.S. military remains in Afghanistan while the Trans-Afghanistan pipeline is being constructed with completion plans set for 2017. Irans competing pipeline project will be completed by the end of 2014 and is catching the attention of China, Russia, India, and others. The U.S. cannot allow renegade regimes, like Iran, to dictate the flow of natural resources in this important region. Therefore, the U.S. government has inflicted punitive economic and political measures upon Iran in an effort to bring it into submission.
The Iraq and Afghanistan wars were both resource wars sold to the American public under false pretenses. Americas empire of 700+ military bases in 130+ nations serves as a global oil protection service, not a national military seeking to protect American citizens. Instead of protecting our nations borders, the U.S. military is used by the Washington elites to protect the petrodollar system. The foundations of the American empire are now crumbling as emerging nations are no longer willing to spend their lives and their new found wealth propping up the U.S. consumer. Nor do they have any desire to tolerate the belligerence of the U.S. war machine.
Like all failing empires, America will fall under its own weight as more nimble economies arise in its wake. Americas attempts at regional dominance of Central Asia will lead to further friction with Russia and/or China. This friction will provide the spark for yet another war.