Everyone’s on edge. France was shaken last night when a gunman wielding an automatic rifle opened fire on a police van in central Paris. One officer was killed and two seriously injured, while the gunman, who has been identified as Karim Cheurfi, was fatally shot trying to flee. President François Hollande said the attack was “terrorist in nature” and ISIS has claimed responsibility. An investigation is underway. Voting begins Sunday in the first round of France’s critical presidential election, and some wonder if heightened fear could swing voters toward far-right candidate Marine Le Pen.