Hundreds of defense contractors that defrauded the U.S. military received more than $1.1 trillion in Pentagon contracts during the past decade, according to a Department of Defense report prepared for Sen. Bernie Sanders. He called the report "shocking." He said aggressive steps must be taken to ensure taxpayer dollars aren't wasted. "The ugly truth is that virtually all of the major defense contractors in this country for years have been engaged in systemic fraudulent behavior, while receiving hundreds of billions of dollars of taxpayer money," said Sanders. "With the country running a nearly $15 trillion national debt, my goal is to provide as much transparency as possible about what is happening with taxpayer money." The report detailed how the Pentagon paid $573.7 billion during the past 10 years to more than 300 contractors involved in civil fraud cases that resulted in judgments of more than $1 million, $398 billion of which was awarded after settlement or judgment for fraud. When awards to "parent" companies are counted, the Pentagon paid more than $1.1 trillion during the past 10 years just to the 37 top companies engaged in fraud. Another $255 million went to 54 contractors convicted of hard-core criminal fraud in the same period. Of that total, $33 million was paid to companies after they were convicted of crimes. Some of the nation's biggest defense contractors were involved. For example, Lockheed Martin in 2008 paid $10.5 million to settle charges that it defrauded the government by submitting false invoices on a multi-billion dollar contract connected to the Titan IV space launch vehicle program. That didn't seem to sour the relationship between Lockheed and the Defense Department, which gave Lockheed $30.2 billion in contracts in fiscal year 2009, more than ever before.