Taliban fighters are increasingly using civilians as human shields in the assault on the southern town of Marjah, an Afghan official said Wednesday as military squads resumed painstaking house-to-house searches in the Taliban stronghold. About 15,000 NATO and Afghan troops are taking part in the offensive around Marjah, which has an estimated 80,000 inhabitants and was the largest town in southern Helmand province under Taliban control. NATO hopes to rush in aid and public services as soon as the town is secured to try to win the loyalty of the population. With the assault in its fifth day, insurgents are...