Two police officers have gone on trial in France over the deaths of two youths that detonated an explosion of violence nearly a decade ago.<br /><br /> Officers Sebastien Gaillemin and Stephanie Klein will face a court in Rennes on charges they failed to prevent the electrocution deaths of Bouna Traore, 15, and Zyed Benna, 17, after the pair hid from police in a high-voltage electricity transformer near their Clichy-sous-Bois housing project northeast of Paris.<br /><br /> Benna and Traore died in the fenced-off power facility on the afternoon of October 27, 2005 as police milled nearby. Their friend Muhittin Altun survived with severe burn injuries.<br /><br /> If found guilty of failing to help two boys, the officers could face a fine and up to five years in prison.