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Tamir Pardo
During an interview with Haaretz in May 2018, Pardo said that in 2011 Netanyahu ordered the Mossad and IDF to prepare for an attack on Iran within 15 days, but he and Chief of Staff Benny Gantz questioned the Prime Minister's legal authority to give such an order without Cabinet approval, so Netanyahu backed off.
https://en.wikipedia.org/wiki/Tamir_Pardo