FAIRFORD, United Kingdom – A Royal Air Force Westland WAH-64D Apache helicopter demonstrates its combat capabilities for spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 16, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – Spectators take photos of aircraft during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A young boy flies his toy Royal Air Force Red Arrow Hawk T1 during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – Spectators visit the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom –A Hawk T1 with the Royal Air Force aeronautical team flies past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A VS Spitfire aircraft flies past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A VS Spitfire aircraft flies past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A B-17 aircraft flies past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom –Lucas Hannahs (right), a U.S. Air Force military dependent, meets with members of the U.S. Air Force Thunderbird aeronautical team during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom –Lucas Hannahs (right), a U.S. Air Force military dependent, stands with members of the U.S. Air Force Thunderbird aeronautical team during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A P-51 Mustang aircraft flies past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – Chancellor Philip Hammond (left) speaks with a U.S. Air Force Captain Angelina Urbina (right), with the U.S. Air Force aeronautical team, during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A U.S. Air Force Thunderbird F-16 aircraft flies past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – Two U.S. Air Force Thunderbird F-16 aircraft fly past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – Two U.S. Air Force Thunderbird F-16 aircraft fly past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A U.S. Air Force Thunderbird F-16 aircraft flies past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – Two U.S. Air Force Thunderbird F-16 aircraft fly past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 15, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A Royal Air Force Westland WAH-64D Apache helicopter demonstrates its combat capabilities for spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 16, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A Royal Air Force Westland WAH-64D Apache helicopter demonstrates its combat capabilities for spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 16, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A Royal Air Force Westland WAH-64D Apache helicopter demonstrates its combat capabilities for spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 16, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A U.S. Air Force B-2 Stealth Bomber and Two F-15 aircraft fly past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 16, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A U.S. Air Force F-22 Raptor flies past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 16, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A U.S. Air Force F-22 Raptor flies past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 16, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A U.S. Air Force F-22 Raptor flies past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 16, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A U.S. Air Force F-22 Raptor and P-51 Mustang fly past spectators during a U.S. Air Force heritage flight at the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 16, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)

FAIRFORD, United Kingdom – A F-22 Raptor flies past spectators during the 2017 Royal International Air Tattoo (RIAT) located at RAF Fairford, United Kingdom, on July 16, 2017. This year commemorates the U.S. Air Force’s 70th Anniversary which was highlighted during RIAT by displaying its lineage and advancements in military aircraft. (U.S. Air Force Photo by Tech. Sgt. Brian Kimball)