If you just want to find the cache, feel free to skip this part. But if you want to learn more about Iron Man, read on and enjoy!
Oh and thanks to CraigsOutside for the inspiring this series with his "Dead Cachers Tell No Tales" puzzle.
While traveling through Afghanistan after an on-site demonstration of his company's latest weapons system for the U.S. military, Stark's convoy comes under attack and he is seriously injured. Stark awakes to find himself bandaged and lying in a furnished cave, where a terrorist group is holding him captive. Yinsen, a talented surgeon who had also been captured, had saved his life by implanting an electromagnet in Stark's chest to keep the shrapnel that could not be removed from making its way to his heart and killing him. Though grateful to be alive, Stark had little to celebrate since his captors expected him to provide them with the same weapons system that he had just demonstrated for the military. After some "persuasion", Stark agrees to build their weapons, but instead begins work on his Mark I armor so that he and Yinsen can escape.
After escaping and realizing that the very weapons he helped design were being used by extremist groups to terrorize innocent citizens, Stark decides to begin a one man crusade to save others from the horrors that his company had created. With that, he began work on the Mark II armor and his quest to save the innocent from those whom would do them harm.