The USW was established May 22, 1942, in Cleveland, Ohio, through the Congress of Industrial Organizations (CIO) by a convention of representatives from the Amalgamated Association of Iron, Steel, and Tin Workers and the Steel Workers Organizing Committee, after almost six years of divisive struggles to create a new union of steelworkers. The drive to create this union included such violent incidents as the infamous Memorial Day, 1937, when Chicago policemen supporting the rival American Federation of Labor (AFL) fired on workers outside a Republic Steel mill and killed 10 men. The founder and first president of the USW, Philip Murray, led the union through its first organizing drives and dangerous first decade, when the workers of USW went on strike several times to win the right to bargain collectively with steel companies. Through collective bargaining they secured higher wages and paid vacations. Significant job actions of the USW include the 1952 steel strike, the steel strike of 1959, and the steel strike of 1986. The 46,000 members of the Aluminum Workers of America voted to merge with the budding steelworker union that was the USW in June 1944. Eventually, eight more unions joined the USW as well: the International Union of Mine, Mill and Smelter Workers (1967); the United Stone and Allied Product Workers of America (1971); District 50, the Allied and Technical Workers of America (1972); the Upholsterers International Union of North America (1985); the United Rubber, Cork, Linoleum & Plastic Workers of America (URW) (1995); the Aluminum, Brick and Glass Workers Union (ABG) (1996); the Canadian Division of the Transportation Communications International Union (1999); and the American Flint Glass Workers Union (AFGWU) (2003). In June 2004, the USW announced a merger with the 57,000 member Industrial, Wood and Allied Workers of Canada (IWA Canada), a major Canadian forestry workers union. In 2005 it then announced an even larger merger with the Paper, Allied-Industrial, Chemical and Energy Workers International Union (PACE). The resulting new union adopted its current name after the PACE merger. In September 2006, the Independent Oil Workers Union of Aruba, which represents refinery workers on the Caribbean island of Aruba, affiliated with the United Steelworkers, becoming the first USW union local outside of the US (including Puerto Rico and the US Virgin Islands) and Canada. In April 2007, the USW also merged with the Independent Steelworkers Union, adding 1,150 members at Arcelor-Mittal's Weirton, West Virginia steel mill.