Wealthy business magnate Elon Musk is sounding the alarm about America's massive national debt, warning that unless action is taken to tackle the problem, the U.S. dollar will become worthless."We need to do something about our national debt or the dollar will be worth nothing," Musk tweeted. The country's national debt is more than $34 trillion, according to fiscaldata.treasury.gov.Responding to Musk, Ed Krassenstein wrote, "The problem is that no administration wants to take on the... Read this story