MELBOURNE/SYDNEY (Reuters) - Firefighters kept wild blazes fueled by strong winds and soaring temperatures from reaching suburban areas of Australia’s capital, Canberra, using airdrops of fire retardant to create a 2.5-kilometre (1.55-mile) long defensive line late on Saturday. A plane releases fire retardant on a field during bushfires near Queanbeyan, New South Wales, Australia, February