London Mayor Boris Johnson attends a rally in Trafalgar Square in central London on January 11, 2015 to commemorate the victims of the attacks in France that killed 17 people and injured scores more. Around 2,000 people gathered in London to honour the victims of Islamist attacks in Paris, many raising pencils to the sky in memory of those killed at satirical weekly Charlie Hebdo. Some in the crowd at Trafalgar Square carried placards saying "Je suis Charlie" and waved French flags.  AFP PHOTO / NIKLAS HALLE'N        (Photo credit should read NIKLAS HALLE'N/AFP/Getty Images)