The North Korean regime seems to have engaged in a dangerous game of brinkmanship over nuclear weapons development, having conducted several missile tests last month, and a nuclear test at the end of May.

In apparent retaliation, US Senators have introduced a bill to impose new economic sanctions on North Korea.

At the same time President Obama has launched a new initiative to try to drastically reduce the worlds nuclear weapons stockpiles.

Tilman Ruff from the International Campaign to Abolish Nuclear Weapons, says this is a positive move and is calling for more debate on international arms control.

2ser’s Ashley Felderhof asked Professor Ruff about the current status of North Korea's nuclear programme.