Billions of dollars spent and spending, thousands of lives lost and three cultures -- USA, Mexico and the International Border region -- impacted. And what's the real cost? Nobody knows. But in a new report from the U.S. Government Accountability Office (GAO), the U.S.-Mexican joint 'war on drugs' comes under scrutiny. For the New York Times' report on the report, see this story. For a direct link to the GAO, click here.