War Imminent as Hussein Rejects Ultimatum
US and Britain make final preparations for war against Iraq to topple government of Pres Saddam Hussein; US Army and Marine divisions roll toward Iraqi frontier following Pres Bush's 48-hour ultimatum to Iraq's Pres Saddam Hussein to leave country or face attack; army of 130,000 American and British soldiers, tanks and armored vehicles arc across 5,000 square miles of Kuwaiti desert; scene described; Special Operations forces reportedly begin secret missions into Iraq; commander of American and British naval forces expresses concern Iraq is preparing attacks against coalition warships; Iraqi Army's dispatch of large number of fishing vessels from coastal ports and moorings into waters where aircraft carriers, destroyers and submarines are preparing to launch aircraft and cruise missiles against targets noted; military intelligence detects preparation of missile launching sites that could be directed at naval targets; photos (M)
