Londoners react to the newsroom shooting in Paris.<br/> <br />By the hundreds, they gathered outside the National Gallery at Trafalgar Square.<br/> <br />A silent vigil -- for ten journalists and two police officers killed earlier when suspected Islamist militants attacked the satirical French weekly, Charlie Hebdo.<br/> <br />'I am Charlie', their signs read.<br/> <br />Their pens held up -- like swords.<br/> <br />(SOUNDBITE) (English) VIGIL ATTENDEE, SAYING:<br/> <br />"I think what shocks me the most is that it has actually happened in this day and age. That some men can just walk into a building and decimate a whole team."<br/> <br />Eleven people were also wounded in the attack, several critically.<br/> <br />Terrorism experts say the gunmen behaved like trained commandos, and that the assault was apparently well-planned.<br/> <br />Witnesses say the journalists had gathered for a weekly meeting and that the gunmen called out some of their victims by name.<br/> <br />Security in France is at its highest level and other governmen
