Rio Tinto iron ore output hit by bad weather in Australia, Canada

[caption id="attachment_778521" align="aligncenter" width="600"] Iron ore operations in the Pilbara. (Courtesy of Rio Tinto)[/caption] Mining giant Rio Tinto (LON, ASX:RIO), the world's second-largest producer of iron ore after Brazil's Vale, said Tuesday iron ore shipments dropped 8% in the first-quarter...