ISLAMABAD (Reuters) - Pakistani authorities said they had arrested a leading al Qaeda member, Moroccan national Yasir al-Jaziri, in the eastern city of Lahore on Saturday. The arrest comes two weeks after the capture of another senior al Qaeda figure, Khalid Sheikh Mohammed, in the northern city of Rawalpindi. Mohammed is suspected of being a leading figure behind the September 11, 2001, attacks on the United States and authorities have said his arrest brought useful leads in their efforts to track down al Qaeda members including the group's leader, Osama bin Laden (news - web sites). "He (al-Jaziri) is less...