More than 400 investigative journalists around the world investigated leaked reports from the US anti-money laundering unit FinCEN for 16 months. It concerns more than 2,100 reports of suspicious money flows that banks made to the American anti-money laundering unit FinCEN. The amounts defy all imagination: totaling an astronomical sum of more than 2 trillion or more than 2,000 billion dollars between 2011 and 2017. These documents are among the deepest secrets of the international banking system. These 2,100 leaked reports are just the tip of the iceberg, as FinCEN received more than 12 million reports over this period.