The government in Canada has rejected calls to push for the release of a 21-year old Canadian prisoner at Guantanamo Bay after video footage of the man being interrogated at the US camp was made public. The film caused an outcry when it was released on Tuesday, showing a teenage Omar Khadr being questioned by intelligence officers. But a Canadian foreign ministry spokeswoman said the prisoner is in "a legal process that must continue". Omar Khadr was just 15 when he was captured by US forces in Afghanistan.