Pictures of cartoonists Georges Wolinski, Cabu, Tignous and Charb and a placard which reads “I am Charlie” are displayed in front of the Paris offices of weekly satirical newspaper Charlie Hebdo in Paris January 8, 2015 the day after a shooting at their offfices. French police extended a manhunt on Thursday for two brothers suspected of killing 12 people at a satirical magazine in Paris in a presumed Islamist militant strike that national leaders and allied states described as an assault on democracy. France began a day of mourning for the journalists and police officers shot dead on Wednesday morning by black-hooded gunmen using Kalashnikov assault rifles.French tricolour flags flew at half mast throughout the country. REUTERS/Gonzalo Fuentes (FRANCE – Tags: CRIME LAW MEDIA)