BEIRUT - Abu Mahdi spends most of his day sitting in a plastic chair in front of a dilapidated concrete block shack on the outskirts of Beirut's southern suburbs puffing on a water pipe and pouring coffee for a steady stream of visitors and customers that have come to examine his inventory. Two of his first customers on a cold winter morning are young fighters in their late teens from the militant Shiite movement Hizbollah who are enraptured with a selection of... (GunPolicy.org)