On 31 January 2018, fewer than two dozen Israeli Mossad agents infiltrated a secret warehouse in southern Tehran, Iran, and pilfered 100,000 documents, including paper records and computer files, documenting the nuclear weapons work of Iran's AMAD Project between 1999 and 2003. The trove was part of Iran's clandestine nuclear archive, and documented years of work on atomic weapons, warhead designs and production plans.