Flashback: An Afghan man buys a 10-year-old girl as his third wife — after murdering his first and second child brides for “bringing shame” upon his Muslim family by failing to obey and please their male owner.As his third child bride, she endured years of torture, rape and unimaginable abuse until she finally escaped. This horrifying story is featured in the documentary “I Was Worth 50 Sheep,” which follows the courageous young girl Sabere and her fight for survival in Afghanistan before the Ta