Photo Gallery: Je suis Charlie!

A French flag flies half-mast at the Elysee Palace in Paris on January 8, 2015, on a day of mourning following an attack on January 7 by armed gunmen on the offices of French satirical weekly Charlie Hebdo. - AFP

A stunned and outraged France was in mourning Thursday, as security forces desperately hunted two brothers suspected of gunning down 12 people in an Islamist attack on a satirical weekly Charlie Hebdo.

The massacre, the country’s bloodiest attack in half a century, triggered poignant and spontaneous demonstrations of solidarity around the world.