on war

• As bush put the nation on war footing , he also raised the terror alert to the second - highest level , warning that terrorists may strike u . s . interests at home or abroad in response to action against iraq . footing , a particular kind of position or base
  在布什宣布全国战争状态时，他还将恐怖威胁等级提升到次最高级，并警告说，作为他们对战争的反应，恐怖分子也许会打击国内外的美国利益。