Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Ralph Haller -  Ralph Haller is the tenth Deputy Director of the National Reconnaissance Office.The Deputy Director National Reconnaissance assists the Director and Principal Deputy Director in the day-to-day direction of the NRO and also serves as the senior Air Force Officer for the Air Force civilian and uniformed personnel assigned to NRO.
Office Holder