By The Associated PressSTRKING RESULTS: Anglo American Platinum Ltd., the world's largest producer of the metal, had an operating loss of $715 million in 2012 as violent labor unrest in South Africa paralyzed its operations for weeks. SPIRALING DOWN? The loss follows a profit of more than $1 billion in 2011. The company says it might close some operations and lay off as many as 14,000 workers. MOTHER LODES: The mining industry is a huge part of the economy in South Africa, which is the world's largest producer of platinum, gold and chromium.