The size of the U.S. nuclear arsenal has decreased drastically since it peaked at 31,255 nuclear weapons in 1967. Many of the reductions since then have come as the result of bilateral arms control agreements with Russia, including the Strategic Arms Reduction Treaty (START) I, which capped deployed arsenals at 6,000 warheads and 1,600 delivery […]
CBS Sacramento Writes About Senior Science Fellow Philip Coyle
Read the full piece here. A Sacramento man is getting lots of questions about North Korea’s nuclear weapons threat. Philip Coyle is a former U.S. weapons tester who retired in Sacramento. Coyle was in charge of the last U.S. nuclear test recorded in 1971. He’s suddenly been getting lots of calls. “It actually started right […]
Fact Sheet: The Threshold Test Ban Treaty (TTBT)
The Treaty on the Limitation of Underground Nuclear Weapon Tests, commonly known as the Threshold Test Ban Treaty (TTBT), is a bilateral agreement between the United States and Soviet Union (now Russia). Signed in 1974, the Treaty prohibits underground nuclear weapons tests greater than 150 kilotons, approximately 10 times larger than the bomb used against […]
Executive Director John Tierney’s Op-Ed in Huffington Post
Read the full piece in the Huffington Post here. No analysis of the Trump Presidency’s First 100 days would be complete without reviewing how his administration has handled the United States’ most immediate existential threat – nuclear weapons. Mitigating the threat of nuclear weapons and their spread is integral to the safety and security of […]
Fact Sheet: The Limited Test Ban Treaty (LTBT)
The Limited Test Ban Treaty (LTBT) (also known as the Partial Test Ban Treaty) is a multilateral treaty banning explosive nuclear testing or “other nuclear explosions” in the atmosphere, outer space, and underwater. The treaty only permits underground nuclear testing if the test does not cause radioactive debris to be present outside the jurisdiction of […]
