AIG

Rolling Stone has a great article here about the government bailout of AIG.
Matt Taibbi breaks it down simple for everyone, and traces the crash back to the origin, or "Patient Zero" of the crisis.

He explains how and why there was no regulation, who was in charge, and how their greed destroyed an economy.

If you are having some difficulty wrapping your head around the whole economic crisis, this article will make it all clear.

more information is available here, here, and here.