On Sunday, hundreds of Greenpeace activists gathered in Paris to mark the 20th anniversary of the sinking of the organization’s ship the Rainbow Warrior. The ship sank in a New Zealand harbor on July 10, 1985 when an explosion ripped open its hull. Greenpeace photographer Fernando Pereira was killed in the incident. The ship was preparing to head to sea to protest against French nuclear bomb tests in the South Pacific. Over the weekend, the French newspaper Le Monde revealed that the late French President Francois Mitterrand personally approved the sinking of the ship. The paper has obtained a handwritten account of the ship’s sinking written by the former head of France’s spy agency that says Mitterrand had authorized the ship to be sunk. One former crew member of the Rainbow Warrior spoke at a commemoration ceremony on Sunday.