Republican opposition in the Senate could scuttle the Obama administration‘s plans to sign on to the European Union‘s Code of Conduct for Outer Space Activities, an agreement that critics say could limit U.S. development and deployment of anti-satellite weapons. Key Senate Republicans are urging Secretary of State Hillary Rodham Clinton to consult with the relevant Senate panels before signing the agreement.

The Obama administration is negotiating with the European Union on an agreement limiting the use of anti-satellite weapons, a move that some critics say could curb U.S. development of space weapons in general.

Russia said further cuts in nuclear weapons sought by the U.S. can be achieved only as part of a multinational accord limiting other types of armaments, a position that dims the Obama administration's chances for swift progress toward one of its biggest foreign policy goals. Future rounds of talks aimed at slashing Russia's large arsenal of short-range tactical nuclear weapons must involve other nuclear powers and focus as well on conventional warheads and weapons in space.

Russia’s Foreign Ministry released a report on Saturday accusing the United States of violating dozens of provisions of nuclear, chemical and biological weapons treaties going back about a decade, apparently in a retort to American critics of a new arms treaty, who have been accusing Russia of violating past agreements.

The U.S. State Department last month warned of potential biological weapons programs in Iran, North Korea and Syria while asserting that major powers China and Russia have not provided full disclosures on their previous efforts on such armaments

A new nuclear arms control treaty signed by the United States and Russia in April would not limit future U.S. plans for missile defense, key military brass said yesterday

The United States has begun talks with Russia and a United Nations arms control committee about strengthening Internet security and limiting military use of cyberspace. Officials familiar with the talks said the Obama administration realized that more nations were developing cyberweapons and that a new approach was needed to blunt an international arms race.

After a long spell of barely disguised animosity, American and Chinese military chiefs are seeking to put their relations on a more cordial footing, in line with ties between their civilian bosses but experts caution not to expect too much from China in terms of transparency about their military affairs.

Russia and other countries are continuing to expand their chemical weapon arsenal despite being signatories to the 1992 Chemical Weapons Convention. A new report highlights the weaknesses in the existing treaty by showing how it fails to cover research into non-lethal chemical weapons or newer chemical compounds (ex. binary weapons) that weren't conceived of at the time of the treaty.