Manila, Oct. 27 -- The Philippine Air Force (PAF) on Monday confirmed that a U.S. Boeing E-4B aircraft - nicknamed doomsday plane as it can survive nuclear attack - landed at the Ninoy Aquino International Airport (NAIA) on Sunday and stayed overnight for refueling and crew rest.

"This aircraft has diplomatic clearance, but there is no VIP (very important person) visit to the Philippines associated with it," it added.

The PAF also said it has assisted the plane on this diplomatic layover. It departed at around 11:38 a.m. Monday.

The E-4B, also known as the "Advanced Airborne Post" or "Nightwatch" aircraft, was modified from the Boeing 747-200B for the U.S. National Emergency Command Post (NEACP) Program.

There are only four such aircr...