Under a heavy, rain-soaked Belgian sky, Sweden's flag was raised Monday at NATO headquarters in Brussels to formally mark its new status as a full member of the western military alliance. The event was witnessed by Swedish Prime Minister Ulf Kristersson, who led a delegation in Brussels that included cabinet ministers, Sweden's military commander-in-chief and the nation's Crown Princess Victoria. Joining NATO was the "only reasonable choice" after Russia launched its full-scale invasion of Ukrai