The widow of an American soldier killed in Afghanistan and another former U.S. soldier partially blinded by a hand grenade plan to file an emergency injunction to stop Ottawa from paying $10.5-million to former child soldier Omar Khadr. Tabitha Speer and Layne Morris allege Mr. Khadr was responsible for the death of Sergeant Christopher Speer and Mr. Morris's injuries in Afghanistan. Two sources say they are expected to ask the Ontario Superior Court as early as Wednesday to uphold a 2015 Utah civil court judgment ordering Mr. Khadr to pay them $134-million (U.S.) for his actions in Afghanistan. "They are trying to get an emergency injunction in a Canadian court to have their award in the United States enforced in Canada," one source said. "Their desire is to have U.S. courts enforced in Canada,…