We told you back in March, on the eighth anniversary of America’s war in Iraq, that besides killing thousands, our engagement over there is a huge drain on financial resources ($780 billion and counting). We had no idea, however, that billions of dollars in cash is literally vanishing. According to new Defense Department audits, U.S. officials still can’t account for $6.6 billion in cash that was flown into Iraq in 2003. The money was supposed to be used to repair the battered country. Instead, it’s gone.