PARIS, FRANCE - APRIL 20: Police secure the area after a gunman opened fire on Champs Elysees on April 20, 2017 in Paris, France. One police officer has been killed, and a second injured by a gunman on The Champs Elysees. Security is heightened in Paris with the first round of France's presidential election on Sunday. (Photo by Aurelien Meunier/Getty Images)
PARIS, FRANCE - APRIL 20: Police officers secure the area after a gunman opened fire on Champs Elysees on April 20, 2017 in Paris, France. One police officer has been killed, and a second injured by a gunman on The Champs Elysees. Security is heightened in Paris with the first round of France's presidential election on Sunday. (Photo by Jeff J Mitchell/Getty Images)
PARIS, FRANCE - APRIL 20: Police officers secure the area after a gunman opened fire on Champs Elysees on April 20, 2017 in Paris, France. One police officer was killed and another injured in the shooting. Security is heightened in Paris with the first round of France's presidential election on Sunday. (Photo by Aurelien Meunier/Getty Images)
PARIS, FRANCE - APRIL 20: Police officers secure the area after a gunman opened fire on Champs Elysees on April 20, 2017 in Paris, France. One police officer has been killed, and a second injured by a gunman on The Champs Elysees. Security is heightened in Paris with the first round of France's presidential election on Sunday. (Photo by Jeff J Mitchell/Getty Images)
PARIS, FRANCE - APRIL 20: Police secure the area after a gunman opened fire on Champs Elysees on April 20, 2017 in Paris, France. One police officer has been killed, and a second injured by a gunman on The Champs Elysees. Security is heightened in Paris with the first round of France's presidential election on Sunday. (Photo by Aurelien Meunier/Getty Images)
