KARACHI — In 2012 alone, police said at least 115 different establishments in Karachi, one the country's largest cities and its commercial hub, have been victims of what locals now dub the “terror tax” — a mafia-style extortion racket that is lining the pockets of the Taliban. “The Taliban hold me completely vulnerable at this point," said on business owner. “It’s terrifying to go into work every day with that looming over you.”