UFW/Global Horizon Contract Signing 4/11/06: The United Farm Workers of America and Global Horizons signed the first nationwide union contract protecting agricultural guest workers. Global Horizons is one of America's largest suppliers of imported foreign farm workers, operating in dozens of states. With proposed guest worker programs a key part of the immigration reform debate, this landmark agreement provides a practical remedy to the long history of abuse and lax enforcement of legal guarantees for imported foreign farm workers: unionization.