The flourishing opium production in Afghanistan has resulted in more than four million addicts in Pakistan. In Peshawar, some of the youngest end up in mud-walled rooms being drilled in extreme Muslim doctrine or on the streets and into prostitution for money and shelter followed by hashish and glue-sniffing.  Yet in this rugged frontier city in northwest Pakistan, where people carry guns as casually as they would a daily newspaper, these young addicts have hope - a charity-run boarding school for homeless, drug-addicted children.– Text and photos by AP