Focus Archive

Forty years ago this month, the Senate approved the Outer Space Treaty, which bars signatory states from placing into orbit any objects carrying nuclear and other weapons of mass destruction. Although it has helped protect space for peaceful uses by all countries, the treaty has not closed off all threats to the safety of military and civilian space assets and the pursuit of other types of space-based weapons.

For instance, some countries have developed offensive weapons capabilities that can shoot down satellites in orbit using ground-based ballistic missiles. The United States is now contemplating “defensive,” space-based, kinetic-energy missile interceptors. The time has come once again for states to engage in dialogue on space security and avert a new and dangerous arms competition in the heavens. (Continue)

For years, some scientists and policymakers have worried that the reliability of U.S. nuclear warheads could diminish as their plutonium components age. Such concerns have led some to argue the United States should resume nuclear testing, rebuild its older warheads, or both. Most recently, plutonium aging has been used by the Bush administration to justify an ambitious new proposal for remaking the weapons complex and the nuclear arsenal.

Think again. A new set of government studies finds that the plutonium primaries, or pits, of most U.S. nuclear weapons “will have minimum lifetimes of at least 85 years,” which is about twice as long as previous official estimates. The findings have led the National Nuclear Security Agency (NNSA) to admit that “the degradation of plutonium in our nuclear weapons will not affect warhead reliability for decades.” (Continue)