This is bbc world news. The headlines. The American Pharmaceuticals giant pfizer says its experimental Coronavirus Vaccine has shown itself to be more than 90 effective in preventing infections. The companys chief executive said it marked a great day for humanity. As the number of us cases passes more than ten million, joe biden has set up a special covid task force. Hes also urged more people to wear facemasks. Donald trump has sacked his defence secretary mark esper. He gave no reason for the dismissal. The Us Republican Senate Majority Leader Mitch Mcconnell is supporting Donald Trumps continued refusal to concede in the president ial election, but other republicans are not. Those are the headlines on bbc news. Hello, and welcome to our look ahead to what the papers will be bringing us tomorrow. With me are the defence editor of the times, lucy fisher, and the uk editor of politico, jack blanchard. A few more papers in since we last spoke, both of you, but lets kick off first with i