on Feb. 27. Beginning hostilities that late, with hot weather approaching, would be extremely hazardous for the United States. Saddam knows this. So does the Security Council. That's the game they're playing. President Bush remains apparently sincere in his determination to rid the world of Saddam and his weapons. The question of the day, the question on which everything hinges, is whether, when the window of legitimacy begins to close, Bush can find his way out of the trap set for him by the Security Council.