Two days before American B-2 stealth bombers dropped the biggest payload of explosives since World War II on Iran, trucks were seen lining up outside the primary target at Fordow.
Satellite images showed scores of cargo vehicles outside a tunnel entrance to Iran's key nuclear base inside a mountain.
Donald Trump has insisted that the Islamic Republic's nuclear program was destroyed in the precision strikes, an assessment backed by the CIA and Israeli intelligence.
But there was also a frantic effort to move centrifuges and highly enriched uranium before US bombers attacked, the key question for the Pentagon now is: where did it go?
One possibility, according to experts, is a secret facility buried even deeper under another mountain 90 miles south of Fordow: 'Mount Doom.'
