In May 2008, at the U.S. Capitol, the CIW announced an agreement with Burger King. The world's second-largest burger chain had originally strongly opposed the campaign, even going so far as to hire a private investigative firm to provide information on the Student/Farmworker Alliance. As part of the announcement, Burger King's chief executive, John W. Chidsey, apologized for prior negative remarks directed towards the CIW and went on to praise the group's efforts. Subway, the largest fast-food buyer of Florida tomatoes, signed an agreement with the CIW six months later in December 2008. With this agreement, four of the world's largest fast-food companies were now supporting the campaign. The CIW and Chipotle Mexican Grill reached a Fair Food Agreement on October 4, 2012, after a six-year campaign by the CIW.