French soldiers patrols at the Gare du Nord railway station, in Paris, France, Thursday, Jan. 8, 2015. Scattered gunfire and explosions shook France on Thursday as its frightened yet defiant citizens held a day of mourning for 12 people slain at a Paris newspaper. French police hunted down the two heavily armed brothers suspected in the massacre to make sure they don't strike again. (AP Photo/Thibault Camus), APTOPIX