More: The analysis by the U.S. intelligence community, whose secret assessments on Iran have often been more sober than the administration's public statements, also found that Tehran retains significant ballistic missile capabilities despite weeks of intense U.S. and Israeli bombardment, three of the people familiar with it said.

Iran retains about 75 percent of its prewar inventories of mobile launchers and about 70 percent of its prewar stockpiles of missiles, a U.S. official said. The official said there is evidence that the regime has been able to recover and reopen almost all of its underground storage facilities, repair some damaged missiles and even assemble some new missiles that were nearly complete when the war began.