Washington, March 4 -- US President Donald Trump has told lawmakers it is not yet possible to know the "full scope and duration" of US military strikes on Iran, as scrutiny intensifies in Congress over the objectives and legal basis of the operation.
In an unclassified letter sent to Capitol Hill, Trump admitted that he had ordered sweeping airstrikes targeting Iran's top leadership and key military infrastructure.
His argument in the letter was that the action has been taken to advance American national interests and eliminate Iran as a global threat, even as members of his administration have argued the strikes were necessary to counter an "imminent threat".
The president said the operation was designed to "neutralize Iran's malign act...