For example, the attempted assassination of Franklin Roosevelt contributed to passage of the National Firearms Act of 1934,[150] and the Kennedy assassination (along with others) resulted in the Gun Control Act of 1968. The GCA is a federal law signed by President Lyndon Johnson that broadly regulates the firearms industry and firearms owners. It primarily focuses on regulating interstate commerce in firearms by largely prohibiting interstate firearms transfers except among licensed manufacturers, dealers, and importers.[151]