U.S. to "fully" develop ground-launched missiles after exiting INF treaty: Pentagon chief

The Pentagon is seen from an airplane over Washington D.C., the United States, on July 11, 2018. The United States will fully develop ground-launched conventional missiles after withdrawing from the Intermediate-Range Nuclear Forces (INF) Treaty, U.S. Secretary of Defense Mark Esper said Friday. (Xinhua/Liu Jie)