The United States says it’s committed to ratifying an international treaty to ban the testing of nuclear weapons.
The US is amongst eight countries worldwide including Iran and the Democratic People's Republic of Korea that need to ratify the UN-brokered Comprehensive Nuclear-Test-Ban Treaty (CTBT) to bring it into force.
American law makers voted against the treaty in 1999, but they’ve now been told by the US government that there is no longer a scientific argument for nuclear testing.
Rose Gottemoeller is the US Under Secretary of State for Arms Control.
Cristina Silveiro spoke to her at a meeting on the margins of the UN General Assembly in New York.
She began by asking Ms Gottemoeller what message the United Sates had brought to the meeting.