US intelligence intercepted conversations between Pakistan-based Ayman Al Zawahri, who succeeded Osama bin Laden as the head of Al Qaeda, and Nasser al-Wuhayshi, the head of the Yemen-based Al Qaeda in the Arabian Peninsula, which revealed a most serious plot since 9/11 and it forced the Obama administration to shut down some 21 or more US missions in the Middle East, the New York Times reported in its online edition on Monday afternoon. Read details in daily Dawn