VANDENBERG AIR FORCE BASE, Calif. - The U.S. Air Force has test-launched an unarmed Minuteman III intercontinental ballistic missile from California.
The missile lifted off from Vandenberg Air Force Base at 3:33 a.m. Thursday.
It was the second Minuteman launch from Vandenberg this week. The first was launched early Sunday.
No details of the test were released. Such tests typically involve a flight over the Pacific Ocean to a target in the Kwajalein Atoll.
Col. Scott Fox, vice commander of the 20th Air Force, said in a statement that the test was a visible demonstration of the nation's nuclear deterrent.
Watch a video of the Sept. 22 launch below (mobile users: http://bit.ly/15VYuDd):