As the Australian Boomers step into the international departure terminal on Wednesday ahead of the long trip to Brazil, the coach of the American Pac-12 All Stars has poured cold water on their dream of a groundbreaking gold medal at Rio.Since converging in Australia for a pre-Olympics training camp and then two matches against the All-Stars, the Boomers have been united in their belief they can claim a podium finish and even perhaps shock the world by winning gold.The Aussies have never won a medal at the Olympics, their best results fourth-placed finishes in 1988, 1996 and 2000.Speaking in Melbourne ahead of the two exhibition matches, star point guard Patty Mills said the entire squad believed a gold medal was within reach.Our goal is gold - weve dreamt about it from when we were little kids, laying in bed dreaming about it, getting that gold medal put