“President Donald Trump had opposed Israeli military action against Iran, favoring negotiations over bombing. But in the days before the strikes began, he became convinced that Israel’s heightened anxiety over Iran’s nuclear enrichment capabilities was warranted,” NBC News reports.“After a pivotal briefing from the chairman of the Joint Chiefs of Staff, Air Force Gen. Dan Caine, on Israel’s plans and U.S. options for supporting its operation, he gave tacit approval to Israel to have at it and decided to provide limited U.S. backing.”