“ Several 'doomsday planes' were spotted circling above the US on Tuesday, just hours after the CIA director made a surprise visit to Moscow. Flight enthusiasts spotted at least five Boeing E-6 Mercury aircraft along the West Coast and in the central region of the nation. These giant unmarked planes, constructed using the frames of the Boeing 707, are built to survive a nuclear war and coordinate America's military response from the air if bases on the ground are attacked. Public flight trackers began following the aircraft at around 1:30pm EST, although the main planes appeared with blank or missing...