Jimmy Hoffa three days, the FBI called off the dig. No human remains were found, and the case remains open. Jimmy Hoffa James Riddle Hoffa (February 14, 1913 – disappeared July 30, 1975) was an American labor union leader who served as the President of the International Brotherhood of Teamsters (IBT) union from 1957 until 1971. He vanished in late July 1975, at age 62. From an early age, Hoffa was a union activist and became an important regional figure with the IBT by his mid-20s. By 1952 he was national vice-president of the IBT, and was its general president between 1957
Dai Francis (trade union leader) same year unsuccessfully challenged Charles, Prince of Wales, in the election for Chancellor of the University of Wales. Francis' son, Hywel, later became a Member of Parliament. Dai Francis (trade union leader) Dai Francis (1911–1981) was a Welsh trade unionist, best remembered for his leadership of the South Wales Miners' Union during the 1970s. As a member of the Gorsedd of the National Eisteddfod of Wales, he took the bardic name Dai o'r Onllwyn. He was the father of MP Hywel Francis. Francis was born at Onllwyn, near Neath. He became the first officer of the South Wales Miners' Union