As the US government assesses the impact of the wiki leaks revelations on military operations in Afghanistan, the posting of the material online has unveiled another previously unknown incident.<br /><br />The documents suggests that four Canadian soldiers who died in 2006 were actually killed when a US jet dropped a bomb on a building they were occupying.<br /><br />Al Jazeera's Imtiaz Tyab reports from Toronto.<br /><br />July 29, 2010
