perating and support costs by more than $US5 billion ($A4.75 billion) by the end of 2014 and will cut spending on exploration and evaluation projects by $US1 billion ($A950.53 million) over the remainder of 2012 and 2013.Its shares closed nine cents lower at $65.90.Analysts are divided on how long the high iron ore prices will last, but most think there are more reasons for it to fall, such as inc