It's a very special day for one of Australia's most recognised landmarks. 90 years ago today, the Sydney Harbour Bridge officially opened to the public. Since then, it's become a well recognised symbol of Australia around the world. But to the residents of Sydney, it's so much more than a tourist attraction. And when things go wrong, it causes chaos across the whole metropolitan area. Tonight, 7NEWS presents the ‘Sydney Harbour Bridge 90th Birthday’ special - a look back at the history of the Sy

On this day in 1930 the two arches of the Sydney Harbour Bridge touched for the very first time. After eight years of waiting and watching, Sydneysiders breathed a sigh of relief as this modern engineering marvel reached a major milestone in its construction. Here are some quick facts: 🔧1,400 people worked on the Sydney Harbour Bridge 🏗️128 cables were used to support each half of the arch 🚂96 steam locomotives were used on the Bridge to test its load capacity To celebrate the joining of the