A technician works on a Rafale fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France, in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. Serpentex is an annual exercise that involves joint terminal attack controllers (JTACs) from 12 countries from March 7 to March 25, 2016. (Photo by Charles Platiau/Reuters)





Technicians work on a Mirage 2000 fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. (Photo by Charles Platiau/Reuters)





Technicians work on Mirage 2000 fighter jets during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. (Photo by Charles Platiau/Reuters)





Pilots leave after flying a Mirage 2000 fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. (Photo by Charles Platiau/Reuters)





Pilots prepare to fly a Mirage 2000 fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. (Photo by Charles Platiau/Reuters)





A pilot prepares to fly a Mirage 2000 fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. (Photo by Charles Platiau/Reuters)





A pilot prepares to take off on a Rafale fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. (Photo by Charles Platiau/Reuters)





A technician passes by Britain's Royal Air Force Hawk fighter jets during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. (Photo by Charles Platiau/Reuters)





A Royal Air Force Hawk fighter jet from Britain (R) passes by a Mirage 2000 fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. (Photo by Charles Platiau/Reuters)





Pilots prepares for take off in a Mirage 2000 fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. (Photo by Charles Platiau/Reuters)





A French Air Force Mirage 2000 fighter jet takes off during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 17, 2016. (Photo by Charles Platiau/Reuters)





Pilots prepare to fly a Mirage 2000 fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. (Photo by Charles Platiau/Reuters)





A pilot prepares for a night mission on a Rafale fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 16, 2016. (Photo by Charles Platiau/Reuters)





A pilot prepares to fly on a Rafale fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 17, 2016. (Photo by Charles Platiau/Reuters)





A pilot prepares to fly on a Rafale fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 17, 2016. (Photo by Charles Platiau/Reuters)





Rafale fighter jets stand on tarmac during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 17, 2016. (Photo by Charles Platiau/Reuters)





Pilots of Spain leave their F18 fighter jets during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 17, 2016. (Photo by Charles Platiau/Reuters)





French Air Force pilots prepare to take off on a Mirage 2000 fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 17, 2016. (Photo by Charles Platiau/Reuters)





A French Air Force Rafale fighter jet takes off during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 17, 2016. (Photo by Charles Platiau/Reuters)





A French Air Force snipper in a Fennec helicopter takes off during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 17, 2016. (Photo by Charles Platiau/Reuters)





A French Air Force snipper in a Fennec helicopter takes off during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 17, 2016. (Photo by Charles Platiau/Reuters)





Britain's Air Force pilots prepare to take off on a Hawk fighter jet during the close air support (CAS) exercise Serpentex 2016 hosted by France in the Mediterranean island of Corsica, at Solenzara air base, March 17, 2016. (Photo by Charles Platiau/Reuters)