PARIS, FRANCE - FEBRUARY 03: French military personnel stand at attention during a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a state funeral led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 03: French military personnel stand at attention during a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a state funeral led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 03: French President Francois Hollande leads a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a state funeral led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 03: French President Francois Hollande and French Prime Minister Manuel Valls (L 2) are seen during a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a state funeral led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 03: French military personnel stand at attention during a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a state funeral led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 03: The flag draped coffin of one of the deceased is carried during a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a state funeral led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 03: French President Francois Hollande leads a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a state funeral led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 03: French military personnel salute during a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a state funeral led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 03: French President Francois Hollande leads a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a state funeral led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 03: French President Francois Hollande delivers a speech as he leads a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a state funeral led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 03: A general view of the ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a state funeral led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 3: French President Francois Hollande pays his respects beside the flag draped coffin of one of the deceased after posthumously awarding the "Legion d'Honneur" during a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a national tribute led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)

PARIS, FRANCE - FEBRUARY 3: French President Francois Hollande (C) walks towards the flag draped coffin of one of the deceased to posthumously award the "Legion d'Honneur" during a ceremony at the Hotel des Invalides in Paris on February 3, 2015, in honour of the nine French servicemen killed in an accident in Spain on January 26, 2015. The coffins of nine French military personnel, killed when a Greek F-16 fighter jet crashed at a Spanish base, were paraded to the sound of the funeral march into the courtyard of Les Invalides in Paris ahead of a national tribute led by President Francois Hollande. (Geoffroy Van der Hasselt - Anadolu Agency)