US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one ...

This area, known as Lop Nur, or Lop Lake, is often likened by defence experts to Area 51, the fabled compound where the US tests its most classified and cutting-edge aircraft. Isolated and tightly ...

The allegations were leveled by U.S. officials late last week. Arms control experts worry that norms against nuclear testing are unraveling.

The US accused China of secret nuclear tests, banned under international agreement, that were building toward tests of larger nuclear warheads.

Within hours of New START lapsing last week, a senior State Department official complained of the pact’s “unacceptable” constraints.

Experts warn that the expiration of a long-standing nuclear arms control treaty between the two superpowers could mark the ...

US accusations about secret Chinese nuclear tests surface amid arms race anxieties, but Beijing says concerns over its ...

By Timothy Gardner and Jonathan Landay WASHINGTON, Feb 19 (Reuters) - President Donald Trump has told Congress he is pursuing a civil nuclear pact with Saudi Arabia that does not include ...

As New START expires, the administration signals it may deploy more warheads and revisit underground testing, raising questions about whether this is leverage or the start of a new arms race.

Trump administration considers deploying additional nuclear weapons and possibly resuming underground nuclear testing following the expiration of the last major US-Russia arms control treaty, a report ...