ISLAMABAD (Reuters) Jamaat-ud-Dawaa Chief told Muslims to be heartened by the death of Osama bin Laden, as his martyrdom would not go in vain. A spokesman for JuD Chief Hafiz Mohammad Saeed said he had told followers at special prayers held for the slain al-Qaeda leader that this great person would continue to be a source of strength and encouragement for Muslims around the world. Osama bin Laden was a great person who awakened the Muslim world, Saeeds spokesman Yahya Mujahid quoted him as saying during prayers at the headquarters of the charity in Lahore on Monday.