File photo of a US Air Force missile maintenance team removing the upper section of an intercontinental ballistic missile with a nuclear warhead

File photo of a US Air Force missile maintenance team removing the upper section of an intercontinental ballistic missile with a nuclear warhead

A US Air Force missile maintenance team removes the upper section of an intercontinental ballistic missile with a nuclear warhead in an undated USAF photo at Malmstrom Air Force Base, Montana. Reviews of the U.S. nuclear arsenal show significant changes are needed to ensure the security and effectiveness of the force, a Defense Department report said November 14, 2014. REUTERS/USAF/Airman John Parie/handout via Reuters

February 15, 2018 11:38 AM (UTC+8)