Secretary of Defense James Mattis officially started the U.S. Department of Defense's review of the country's nuclear arsenal Tuesday, according to the Pentagon.
President Donald Trump directed Mattis to conduct a review after taking office in January. The full-scope review comes as concerns over the aging nuclear arsenal are growing in both the White House and Congress.
"In National Security Presidential Memorandum 1, dated Jan. 27, the president directed the secretary of defense to conduct a Nuclear Posture Review to ensure the U.S. nuclear deterrent is safe, secure, effective, reliable and appropriately tailored to deter 21st-century threats and reassure our allies," said Pentagon Chief Spokesperson Dana White in a statement.
Deputy Secretary of Defense Robert Work and Air Force Gen. Paul Selva, vice chairman of the Joint Chiefs of Staff, will lead the review in cooperation with "interagency partners," according to White. A final report will be issued at the end of the year.
The review comes at a time when the U.S. is facing increased nuclear threats. North Korea continues to advance its nuclear program and has increased missile testing in the last two years. Russia is believed to have violated a decades-old nuclear agreement banning the deployment of intermediate-range ballistic nuclear missiles. The Russian military is engaged in a military modernization program that includes both its strategic and tactical nuclear weapons.
A significant portion of the current U.S. nuclear arsenal is based on designs from the 1960s and 1970s. The Heritage Foundation's 2017 Index of Military Strength rated the U.S. nuclear arsenal "strong," just one step down from "very strong," but leaders within the military, the White House and Congress are concerned over the aging arsenal.
"The United States must greatly strengthen and expand its nuclear capability until such time as the world comes to its senses regarding nukes," said Trump tweeted in December.
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