A Swedish soldier looks out of a hatch on their armored vehicle during the annual "Winter Sun" exercises in the forests north of Boden on March 19, 2021, as some 900 troops test their ability to operate in sub-Arctic climates. - In a snow-draped forest in northern Sweden, hundreds of soldiers in white-camouflaged uniforms built dugouts, patrolled on skis and laid mock ambushes to test their readiness to fight in Arctic environments. (Photo by Jonathan NACKSTRAND / AFP)