Photo illustration shows a truck being loaded with iron ore in the Pilbara region of Western Australia. A major iron ore firm Friday launched a High Court challenge to Australia's controversial tax on... more 

Photo illustration shows a truck being loaded with iron ore in the Pilbara region of Western Australia. A major iron ore firm Friday launched a High Court challenge to Australia's controversial tax on the mining boom as the government reiterated its intention to introduce the levy on July 1 less