Months after his death in a police shooting. Deal off. Comcast is reportedly pulling the bid for Time Warner Cable after the megamerger raised antitrust concerns. Mapping the wooly mammoth genome. The scientific discovery that may take us a step closer to cloning the prehistoric creatures. Good evening. Im antonio mora. This is Al Jazeera America. We begin with the fatal error that took the lives of two u. S. Hostages in pakistan. A u. S. Drone strike in january killed american warren wine stein and italian aid worker leeporto. President obama apologized for the deaths but tonight theres a new conversation about deadly force. Jamie mcintyre has more. Reporter the white house says there were two separate drone strikes in january that targeted a compound in pakistan near the afghanistan border. One attack head two aid workers held captive there. American wine stein and leporto. Both were abducted in afghanistan where they were working to improve the lives of pakistani people. While he di