With Sunday's firing of an intermediate-range missile that could strike all of Japan — and beyond — has North Korean leader Kim Jong Un opened the door to tests of increasingly powerful weapons after years of focusing on less provocative launches?

Two of the United States’ top allies in the region seem to think so.

Tokyo and Seoul found themselves in rare agreement on at least one thing this week: the growing possibility that North Korea will test-fire an intercontinental ballistic missile in the near future.