An obscure law firm in Central America is the source of what’s being called the largest information leak in history.

Emails and documents reveal how the world’s richest and most powerful, from Vladimir Putin to the prime minister of Iceland, hide their business dealings using offshore tax havens and shell companies.

Mossack Fonseca had 2.6 TB of data leaked. It was released to Süddeutsche Zeitung about a year ago. They partnered with the International Consortium of Investigative Journalists to go through all the data and are finally starting to publish their findings.