SEAN O’KEEFE WILL RESIGN as NASA Administrator. Reportedly, at the top of the replacement list: “Air Force Lt. Gen. Ronald Kadish, who retired in September after three years as the director of the United States’ effort to develop a system to shield the country and its troops from a missile attack. The other four men under consideration are former Congressman Robert Walker and former shuttle astronauts Ron Sega, Charles Bolden and Robert Crippen.”

UPDATE: Rand Simberg has more.