This week the National Nuclear Security Administration (NNSA) announced that 546 kilograms of plutonium and highly enriched uranium (HEU) shipped from Japan arrived in the United States.

The history of nuclear security has been described as an example of “punctuated equilibrium” -- long periods of inaction and complacency followed by events that catalyze action. U.S. history is rife with examples where the discovery of vulnerabilities or major incidents led agencies to strengthen nuclear security requirements.

Are nuclear sites secure?  There are some who might assume the answer is yes and that we should not worry about the possibility of nuclear bomb material being stolen. Yet, recent history has repeatedly demonstrated that high security facilities thought to be secure were actually vulnerable. Two such incidents last month illustrated this idea.

As part of the USA Freedom Act, Congress yesterday passed key legislation that will finally permit U.S. ratification of two important treaties that strengthen international nuclear security. While the Senate gave its advice and consent for ratification of the 2005 amendment to the Convention on Physical Protection of Nuclear Materials (CPPNM) and the International Convention on the Suppression of Acts of Nuclear Terrorism (ICSANT) years ago, the treaties require parties to criminalize certain acts related to nuclear terrorism, so passage of implementing legislation was needed before the United States could ratify them.  Failure to ratify these key treaties on nuclear security and nuclear terrorism before any of the first three nuclear security summits, when the United States was pushing the world to act on nuclear security, has been a substantial embarrassment.

The Obama administration is proposing to boost Department of Energy nonproliferation funding to $1.94 billion—more than a $300 million increase from what Congress appropriated last year—in fiscal year 2016. But this is an increase over the very low fiscal year 2015 budget proposed by the administration and then further cut by Congress. Both Congress and the Russian government have cut back on further U.S.-funded nuclear security work in Russia, and the Obama administration has yet to develop major new initiatives that could absorb those resources.

One of the more notable storylines throughout 2014 was the continued failures of the U.S. Secret Service. There were three striking high profile lapses in the Secret Service’s ability to protect President Obama: one where a man jumped over the White House fence, running through the front door of the White House and throughout its main floor; another where an armed man with an arrest record was able to ride on the same elevator as the President; and another where a man posing as a Member of Congress was able  to sneak into a secured area where the President was speaking. Towards the end of the year, problems within the Secret Service became a hotly debated political football, resulting in the resignation of the Service’s director.

Advocates of preventing nuclear terrorism received an early holiday present. Earlier in the year, two of the four Congressional committees most directly responsible for nuclear security policy had included language in bills that would have damaged the United States' ability to engage in nuclear security cooperation with Russia.  But Congress has taken responsible action in supporting continued work with Russia in this area in the combined House-Senate version of the FY2015 National Defense Authorization Act.

Last weekend, the New York Times published a debate on whether, as a result of tension over Ukraine, the United States should cut off nuclear security cooperation with Russia. As the Times reported before the debate, Russia may be bringing nearly all of this cooperation to an end–but there are some in the United States saying the U.S. government should act to end it whether or not Russia is willing to continue. Given the deteriorating relationship between the two countries, this issue should be debated now. We are continuing the debate on Nuclear Security Matters and welcome readers to send us their thoughts.