Government counterterrorism officials gave new details on Friday of what the White House said was a foiled 2002 plot to fly hijacked airplanes into targets on the West Coast, but their account suggested that the Bush administration might not have understood the dimensions of the plot until two major terror suspects were caught in 2003. Both suspects, Khalid Shaikh Mohammed and Riduan Isamuddin, better known as Hambali, had been involved in plans for such an attack, they said. President Bush referred obliquely to the planning in a speech on Thursday, when he said the United States and its partners had...