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BURBANK, CA - FEBRUARY 05: Director Clint Eastwood attends the premiere of 'The 15:17 To Paris' at Warner Bros. Studios on February 5, 2018 in Burbank, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)

BURBANK, CA - FEBRUARY 05:  Director Clint Eastwood attends the premiere of 'The 15:17 To Paris' at Warner Bros. Studios on February 5, 2018 in Burbank, California.  (Photo by Axelle/Bauer-Griffin/FilmMagic)

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CULVER CITY, CA - JUNE 04: (L-R) Honorees Anthony Sadler and Airman First Class Spencer Stone, actor/director Clint Eastwood, and honoree Specialist Alek Skarlatos attend Spike TV's 10th Annual Guys Choice Awards at Sony Pictures Studios on June 4, 2016 in Culver City, California. (Photo by Mike Windle/Getty Images for Spike TV)

CULVER CITY, CA - JUNE 04:   (L-R) Honorees Anthony Sadler and Airman First Class Spencer Stone, actor/director Clint Eastwood, and honoree Specialist Alek Skarlatos attend Spike TV's 10th Annual Guys Choice Awards at Sony Pictures Studios on June 4, 2016 in Culver City, California.  (Photo by Mike Windle/Getty Images for Spike TV)

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Anthony Sadler (L), from Pittsburg, California, and Alek Skarlatos from Roseburg, Oregon, hold their medals as they sit in a restaurant after a brief ceremony in the town of Arras, northern France, on August 21, 2015. The American servicemen overpowered a gunman armed with a Kalashnikov who opened fire on a high-speed train travelling from Amsterdam to Paris on August 21, 2015. AFP PHOTO / STRINGER (Photo credit should read -/AFP/Getty Images)

Anthony Sadler (L), from Pittsburg, California, and Alek Skarlatos from Roseburg, Oregon, hold their medals as they sit in a restaurant after a brief ceremony in the town of Arras, northern France, on August 21, 2015. The American servicemen overpowered a gunman armed with a Kalashnikov who opened fire on a high-speed train travelling from Amsterdam to Paris on August 21, 2015.  AFP PHOTO / STRINGER        (Photo credit should read -/AFP/Getty Images)

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CULVER CITY, CA - JUNE 04: Honoree Specialist Alek Skarlatos, Honoree Anthony Sadler and Honoree Airman First Class Spencer Stone attend Spike TV's Guys Choice 2016 at Sony Pictures Studios on June 4, 2016 in Culver City, California. (Photo by Jason LaVeris/FilmMagic)

CULVER CITY, CA - JUNE 04:  Honoree Specialist Alek Skarlatos, Honoree Anthony Sadler and Honoree Airman First Class Spencer Stone attend Spike TV's Guys Choice 2016 at Sony Pictures Studios on June 4, 2016 in Culver City, California.  (Photo by Jason LaVeris/FilmMagic)

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BURBANK, CA - FEBRUARY 05: Director Clint Eastwood, actress Alison Eastwood and actor Scott Eastwood arrive for the Premiere Of Warner Bros. Pictures' 'The 15:17 To Paris' held at Steven J. Ross Theater/Warner Bros Studios Lot on February 5, 2018 in Burbank, California. (Photo by Albert L. Ortega/Getty Images)

BURBANK, CA - FEBRUARY 05:  Director Clint Eastwood, actress Alison Eastwood and actor Scott Eastwood arrive for the Premiere Of Warner Bros. Pictures' 'The 15:17 To Paris' held at Steven J. Ross Theater/Warner Bros Studios Lot on February 5, 2018 in Burbank, California.  (Photo by Albert L. Ortega/Getty Images)