This story was updated on Aug. 19 at 1:23 p.m. EST to include video of the test. The Defense Department on Aug. 18 conducted a test of an intermediate-range, ground-based cruise missile, about two weeks after the withdrawal from the Intermediate-Range Nuclear Forces Treaty. A mobile launcher fired the conventionally configured cruise missile at San Nicolas Island, Calif., and it accurately “impacted its target” more than 500 kilometers away, according to a Pentagon statement. “Data collected and lessons learned from this test will inform the Department of Defense’s development of future intermediate-range capabilities,” the statement reads. The statement alludes to...