In this image taken with a slow shutter speed and provided by the U.S. Air Force, an unarmed Minuteman 3 intercontinental ballistic missile launches during an operational test just after midnight, Wednesday, May 3, 2017, at Vandenberg Air Force Base, Calif. The U.S. has about 450 of the missiles and they are routinely tested. But the latest tests come amid rising tensions with North Korea, which has tested its own nuclear missiles — including some designed to reach the United States. (2nd Lt. William Collette/U.S. Air Force via AP)