Note, Israel was told about the documents and the warehouse, likely by the MEK. The MEK and the Mossad often perform joint
operations. For context on the MEK operations:
The MEK has been instrumental in exposing Iran’s nuclear weapons program. Relying on a vast network inside Iran, MEK revelations of the weapons program significantly contributed to the world peace and the national security of the United States.
These revelations triggered the International Atomic Energy Agency (IAEA) inspections of the uranium enrichment facility in Natanz and Heavy Water Facility in Arak in 2002 for the first time, and since then, the majority of the visits by the IAEA inspection teams have been to the sites first exposed by the MEK.
Senior U.S. officials including President Bush, Vice President Dick Cheney, and Secretary of State Condoleezza Rice have repeatedly pointed to the role the MEK had played in getting the world attention on Iran’s nuclear weapons program.
In March 2005, President, George W. Bush, emphasized that the MEK’s revelation of Natanz prompted an international
campaign to stop the nuclear weapons program of Iran. “Iran has concealed its — a nuclear program. That became discovered, not because of their compliance with the IAEA or NPT, but because a dissident group pointed it out to the world.”
Many of the key front companies exposed by the MEK such as Mesbah Energy, Novin Energy, Kalaye Electric, Kavoshyar Company, and Farayand Technique were eventually sanctioned by the Treasury Department. In July 2011, the MEK exposed a new nuclear organization overseeing the entire nuclear program and run by the military, known as SPND. The U.S. Government designated that entity in 2014. In addition, many companies, key nuclear experts, and military institutions exposed by the MEK have been sanctioned by the United Nations Security Council resolutions 1737, 1747, and 1803.
If it were not for the MEK nuclear revelations, Tehran would have had the bomb by now. Congressman Brad Sherman (D-CA) told a House Foreign Affairs Committee Hearing “We all owe a debt of gratitude to the MEK for bringing this information to the world, and causing the United States and the world to focus on the problem.” More here.