The FBI, the Department of Justice and British and Australian authorities have launched a joint investigation into the Monaco company Unaoil, which brokers contracts between governments and international oil service giants. This comes after The Huffington Post and Australia’s Fairfax Media published a multi-part exposé based on thousands of leaked documents showing how Unaoil paid million-dollar bribes to government officials in Iraq, Libya, Kazakhstan, Syria, Tunisia and other countries to broker contracts for some of the world’s largest companies, including Halliburton and its former subsidiary KBR. The exposé also shows how U.S. military contractor Honeywell colluded to conceal bribes in Iraq contracts. Reporters are calling it the biggest leak of files in the history of the oil industry.