<human>:  Why did the leak happen with respect to the Panama Papers?
<bot>: The leak happened because the company that was hosting the papers, Mossack Fonseca, was hacked. The Panama Papers were a huge leak of documents from Mossack Fonseca, a Panamanian law firm that specializes in creating shell companies. The leak was so big that it was reported by the New York Times, the Guardian, the BBC, and other news outlets.