Yesterday more than a million people, including 40 world leaders marched together through the streets of Paris in an unique display of apparent unity, solidarity and resistance to terrorism. This event was a show of mourning and celebration in response to the attacks which began with the massacre at the Charlie Hebdo magazine office and ended two days later after two sieges and a major police operations. Since the attacks there's been much discussion and protestations about the reasonings behind the killings - if it's possible to know, now that the killers have been "neutralised". An issue of Freedom of Speech and what constitutes freedom, respect and offence ?