US Carries Out Underground Test In Nevada To Detect Nuclear Explosions Globally

“They will help reduce global nuclear threats by improving the detection of underground nuclear explosive tests.”

NEVADA - After Russia revoked their ratification of the Comprehensive Nuclear Test Ban Treaty, the United States carried out a "subsurface chemical explosion" at the Nevada Security Site (NNSS) in order to improve the ability of the United States to detect low-yield nuclear explosions globally. 

Statement By The National Nuclear Security Administration On The Test