Vandenberg Air Base, California - The United States put into orbit a spy satellite from California on Saturday.
A powerful Delta 4 Heavy rocket carrying the satellite of the National Exploration Office was lifted from the Vandenberg Air Base at 11:10 Pacific time.
As usual with confidential missions, the United Launch Alliance transmitted the launch online after discarding the aerodynamic coverage.
Details of the mission, labeled NROL-71, were not released.
The launch was postponed several times last year due to a loss of hydrogen, high winds and problems with ground communications equipment.
The National Exploration Office is responsible for US intelligence satellites.
The United Launch Alliance is a joint venture between Lockheed Martin and Boeing.
The Delta 4 Heavy is 71 meters (233 feet) high.