The Trump administration had been considering its military options, which ranged from targeting leaders to hitting Iran’s nuclear program. But officials discovered that the U.S. could not conduct a major offensive as quickly as they had hoped without real risks to American forces, support from allies, and regional stability, two U.S. officials told us. Even though Trump has boasted about a “massive Armada” sprinting toward Iran, the U.S. does not have enough ships and planes in the region to conduct weeks of strikes, the officials said. It also does not have clear targets: The White House has yet to outline to military commanders what it would want to achieve through strikes, the officials said, suggesting that the use of force is not imminent.