New NASA No. 3

NASA's getting a new No. 3. The agency's associate administrator, Rex Geveden, announced Wednesday that he's leaving the agency at the end of the month to join Teledyne Technologies. He'll be succeeded by Christopher Scolese, who currently is NASA's chief engineer. Scolese has been with the agency since 1987, and previously has served as deputy director of the Goddard Space Flight Center in Greenbelt, Md., and deputy associate administrator in the agency's Office of Space Science.