The presence of four Asia-Pacific leaders at the NATO summit this week suggests that Ukraine is not the only major security issue on the agenda of the European-North American defense alliance. The idea of not letting NATO’s focus drift outside of the “North Atlantic” in its name is backed up by Article 5 of the NATO treaty, its mutual defense clause, which stipulates an armed attack on one alliance member is to be treated like an attack on all. “NATO is a regional alliance of Europe and North America, but the challenges we face are global,” he wrote, noting the summit invitations for the Pacific leaders