An American battalion arrives in Ostersund, Sweden after driving across the border from Norway, to attend the Defence exercise Aurora 23, April 17, 2023. The Aurora 23 military exercise will be held between 17 April and 11 May 2023 and its one of the largest in Sweden in many years, with around 26,000 people to participate. TT News Agency/Pontus Lundahl via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. SWEDEN OUT. NO COMMERCIAL OR EDITORIAL SALES IN SWEDEN.