A ceremony has been held in Paris ending a week of commemorations for the victims of the attacks on the satirical newspaper Charlie Hebdo and a Jewish supermarket a year ago. <br />People gathered in the Place de la Republique, the site of defiant protests against the killings. <br />President Hollande laid a wreath in the Place de la Republique, where a commemorative oak tree was unveiled, and a minute's silence was observed.
