CAIRO (Reuters) - Islamic State warned in a new video on Monday that countries taking part in air strikes against Syria would suffer the same fate as France, and threatened to attack in Washington. The video, which appeared on a site used by Islamic State to post its messages, begins with news footage of the aftermath of Friday's Paris shootings in which at least 129 people were killed. The message to countries involved in what it called the "crusader campaign" was delivered by a man dressed in fatigues and a turban, and identified in subtitles as Al Ghareeb the Algerian....