washington discuss iran north korea u.s. military leaders thursday president donald trump pose photo dinner declare moment calm storm guy know represent trump say journalists gather white house state din room photograph first lady melania trump uniform military leaders spouses maybe calm storm say storm find trump tell question reporters classical music play background table set nearby blue room fancy meal white house immediately reply request clarify trump remark early even seat top defense officials cabinet room trump talk threat north korea prevent iran get nuclear weapon north korea goal denuclearization say allow dictatorship threaten nation ally unimaginable loss life must prevent happen do necessary believe me speech unite nations general assembly last month trump say unite state would totally destroy north korea need defend u.s. ally president thursday also tough word iran say country live spirit agreement forge world power curb nuclear program senior administration official say thursday trump expect announce soon would decertify landmark agreement trump fill top post within administration military general include chief staff retire general john kelly national security adviser lieutenant general h.r mcmaster mcmaster normally dress civilian clothe white house wear uniform meet without specific trump press leaders fast provide military options need move forward also expect provide broad range military options need much fast pace know government bureaucracy slow depend overcome obstacles bureaucracy say cabinet room meet meet military trump talk 'calm storm