Military exercise Aurora has begun in southern Sweden, in Stockholm, and on the island of Gotland. Soldiers from numerous countries are taking part, including Ukraine and the United States. According to Rear Admiral Jonas Wikström, the exercise’s commander, the main theme of this year’s edition of Aurora will be the defence of the Alliance. In previous years, the focus was on defending Sweden against invasion. Approximately 18,000 participants will take part in the drills , including 16,000