Phil Alden Robinson (born March 1, 1950) is an American film director and screenwriter whose films include "Field of Dreams", "Sneakers", and "The Sum of All Fears".
Rhinestone is a 1984 American musical comedy film directed by Bob Clark from a screenplay by Sylvester Stallone and Phil Alden Robinson and starring Stallone and Dolly Parton.
Field of Dreams is a 1989 American fantasy-drama sports film directed by Phil Alden Robinson, who also wrote the screenplay, adapting W. P. Kinsella's novel "Shoeless Joe".
 It stars Kevin Costner, Amy Madigan, James Earl Jones, Ray Liotta and Burt Lancaster in his final role.
 It was nominated for three Academy Awards, including for Best Original Score, Best Adapted Screenplay and Best Picture.
The Sum of All Fears is a 2002 American spy thriller film directed by Phil Alden Robinson, based on Tom Clancy's novel of the same name.
 The film, which is set in the "Jack Ryan" film series, is a reboot taking place in 2002.
 Jack Ryan is portrayed as a younger character by Ben Affleck, in comparison to "The Hunt for Red October" starring Alec Baldwin, along with the film's subsequent sequels, "Patriot Games" and "Clear and Present Danger", both of which starred Harrison Ford.
David Nixon is an American film director and film producer.
 He is the director and producer of "Letters to God" and a co-producer and assistant director of "Fireproof" and "Facing the Giants".
David Nixon (29 December 1919 – 1 December 1978) was an English magician and television personality.
 At the height of his career, Nixon was the best-known magician in the UK.
David Nixon (born March 16, 1985 in College Station, Texas) is a former American football linebacker.
 He was undrafted in the 2009 NFL Draft to the Oakland Raiders.
 He played college football at Brigham Young University.
In the Mood (also known as "The Woo Woo Kid") is a 1987 film directed by Phil Alden Robinson.
 It is set in the 1940s and stars Patrick Dempsey and Beverly D'Angelo.
The Angriest Man in Brooklyn is a 2014 American comedy-drama film directed by Phil Alden Robinson, It is a remake of the 1997 Israeli film "The 92 Minutes of Mr. Baum", written and directed by Assi Dayan.
 It stars Robin Williams, Mila Kunis, Peter Dinklage and Melissa Leo.
 The film follows an angry, bitter man whose doctor tells him he has a brain aneurysm and has only 90 minutes to live.
 As the patient races around the city, trying to right his wrongs, the doctor attempts to find him and take him to a hospital.
Sneakers is a 1992 American comedy caper film directed by Phil Alden Robinson, written by Robinson, Walter Parkes, and Lawrence Lasker, and starring Robert Redford, Dan Aykroyd, Ben Kingsley, Mary McDonnell, River Phoenix, Sidney Poitier and David Strathairn.

Question: What profession do both Phil Alden Robinson and David Nixon share?
Answer: film director