MINDANAO, PHILIPPINES - There are so many links between the Abu Sayyaf Group of the Philippines, which beheaded an American hostage a few months ago, and Osama bin Laden's Al Qaeda terrorist network, that on paper they look like the route map for a Peshawar-based airline. The links run from that high, bleak border city in Pakistan to terrorist dens in Afghanistan and Yemen; to murders and bombings in the Philippines; to the first attack on the World Trade Center; to a foiled attempt to assassinate the pope during a 1995 visit to Manila. A captured Abu Sayyaf guerrilla, ...