MANILA, Philippines –– The man suspected of masterminding the Sept. 11 attacks lived lavishly in the Philippines with his nephew, the 1993 World Trade Center plotter, partying, scuba-diving and renting a helicopter as they planned attacks against Americans, according to a former police official who investigated al-Qaida. U.S. counterterrorism officials have said that since Sept. 11, evidence has mounted that Khalid Shaikh Mohammed was chief among Osama bin Laden lieutenants organizing the plot that sent hijacked passenger jets crashing into the World Trade Center, the Pentagon and a Pennsylvania field, killing more than 3,000 people. Abu Zubaydah – a senior...