Pakistan's Christians fearful amid Asia Bibi backlash

It is a chilly winter's morning and a weak blue fog has settled over Rawalpindi as we arrive at the city's St. Joseph's Cathedral. A security guard, wrapped in navy shawls and a purple balaclava ushers us in, where the grounds lay deserted and still. A sense of unease is palpable among the tiny stream of early morning worshipers walking in.