This photo provided by Roger MacKertich shows a polar bear on a barrier island Sept. 18, 2019, near Kaktovik, Alaska. (Roger MacKertich via AP)

French air force Commander Dorian (surname withheld by the French military) uses his hands to shield his ears from the scream of the jet engines of a Rafale fighter preparing to take off from the Siauliai Air Base in Lithuania on a NATO air-policing mission on Monday, April 20, 2026. (AP Photo/John Leicester)

Members of a French air force detachment of personnel and Rafale jets stationed on a monthslong deployment at the Siauliai Air Base in Lithuania on a NATO air-policing mission play chess in the detachment's headquarters at the base on Monday, April 20, 2026. (AP Photo/John Leicester)

A member of the French air wing of Rafale fighters jets deployed on a NATO air-policing mission at the Siauliai Air Base in Lithuania wears a mission badge on her arm on Sunday, April 19, 2026 (AP Photo/John Leicester).

Romanian air force Col. Mihaita Marin, commander of a Romanian air wing of F-16 fighter jets deployed at the Siauliai Air Base in Lithuania on a NATO air-policing mission, speaks during an interview on Monday, April 20, 2026. (AP Photo/John Leicester)

A flight-crew member climbs into the cockpit of a French air force Rafale fighter jet stationed on a NATO air-policing mission at the Siauliai Air Base in Lithuania as another member of the French detachment stands at the foot of the ladder on Sunday, April 19, 2026 (AP Photo/John Leicester)

Britain's Home Secretary Shabana Mahmood, left, signs an agreement with France's Interior Minister Laurent Nunez during her visit in Dunkirk, France, Thursday April 23, 2026. (Stefan Rousseau/Pool Photo via AP)

A French police car patrols on the beach of Zuydcoote, near Dunkirk, northern France, Thursday, April 23, 2026. (AP Photo/Michel Euler)