A citizen holds a placard which reads “I am Charlie” as he gathers in front of the Notre Dame Cathedral in Paris during a minute of silence for victims of the shooting at the Paris offices of weekly satirical newspaper Charlie Hebdo on Wednesday

A citizen holds a placard which reads “I am Charlie” as he gathers in front of the Notre Dame Cathedral in Paris during a minute of silence for victims of the shooting at the Paris offices of weekly satirical newspaper Charlie Hebdo on Wednesday

A citizen holds a placard which reads “I am Charlie” as he gathers in front of the Notre Dame Cathedral in Paris January 8, 2015 during a minute of silence for victims of the shooting at the Paris offices of weekly satirical newspaper Charlie Hebdo on Wednesday. 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. REUTERS/Jacky Naegelen (FRANCE – Tags: CRIME LAW RELIGION)