JOIN US ON OUR FACEBOOK AND TWITTER PAGE Alan Greenspan issued a dire warning about the U.S. economy during an interview with Fox News on Thursday. Greenspan said that as Venezuela descends into martial law, the U.S. is heading in the same direction. Greenspan warned that the U.S. has "a global problem of a shortage of productivity growth" which is leading it into an impending disaster. Foxbusiness.com reports: "What the Fed does at this particular stage is less important than what the markets are doing. And what the markets are beginning to show us is acceleration in money supply for the first time in a very long time… We have a global problem of a shortage in productivity growth and it's not only the United States but it's pretty much around the world and it's being caused by the fact that the populations everywhere in the Western world, for example, are aging and we are not committing enough of our resources to fund that," he said. Greenspan said the main thing confronting our