The Coathanger, as Sydney's Harbour Bridge is affectionately known, was opened 75 years ago. It was the first time in 25 years the bridge had opened to the public to walk across. Some people stopped to admire the latticework of the bridge's superstructure. Some 6m rivets hold together the 52,000 tonnes of steel which make up the bridge. The bridge means much to Sydney and Australia, arising amid the Great [Economic Downturn] of the 1930s. Festive hats dotted the crowd which was entertained by fly-pasts, a regatta and Aboriginal sunset ceremonies.