MUMBAI, Feb. 6 -- A wave of sorrow swept through the Shia Ismaili community on Tuesday night as news of the passing of Prince Karim Al-Hussaini Aga Khan IV, the 49th hereditary Imam (spiritual leader) of the Shia Ismaili Muslims, and founder and chairman of the Aga Khan Development Network, was announced. He died in Lisbon, Portugal, aged 88....