OTTAWA -- Conservative Leader Stephen Harper cited security concerns on Tuesday for his refusal to commit to doing more to help refugees from the Middle East. As provinces pledged their own funds to help alleviate the crisis, Harper deflected a question about whether he would send more staff to the region to help an already over-stretched bureaucracy. Security is paramount and every potential refugee needs careful screening, Harper said. "We cannot open the floodgates and airlift tens of thousands of refugees out of a terrorist war zone without proper process," Harper said in a Facebook question and answer session. "That...