Venezuelan President Hugo Chavez said on Wednesday his government was cancelling all mining concessions and would not award any new deals to transnational companies as part of a wider sector restructuring. "Recently ... we decided, after looking at this and looking at that, to cancel all mining concessions. We will not give any more concessions to transnationals," Chavez said in a speech late on Wednesday. Left-winger Chavez has launched a broad campaign to review energy and mineral contracts signed by Venezuela before he first won office in 1998. He says some of the deals are robbing the world's No....