Belgium NATO Sweden

Members of protocol attach the Swedish flag as they prepare for a flag raising ceremony to mark the accession of Sweden at NATO headquarters in Brussels, Monday, March 11, 2024. Sweden has formally joined NATO as the 32nd member of the transatlantic military alliance, ending decades of post-World War II neutrality and centuries of broader non-alignment with major powers as security concerns in Europe have spiked following Russia's 2022 invasion of Ukraine. (AP Photo/Geert Vanden Wijngaert)