The head of the Comprehensive Nuclear-Test-Ban Treaty Organization sees the expiration of the arms control pact between the United States and Russia earlier this month as an opportunity to create a new nuclear disarmament framework.

"The situation of the (Intermediate-Range Nuclear Forces Treaty) ... proves once again that nothing is perfect. But one thing you should remember is that everything is perfectible," Lassina Zerbo, executive secretary of the organization's preparatory commission, said in a recent interview.

The INF, a landmark nuclear arms control pact signed in 1987 by U.S. President Ronald Reagan and Soviet leader Mikhail Gorbachev, banned the nations from fielding land-based missiles with a range of 500 to 5,500 km. It came to an end on Aug. 2, raising fears of a new arms race.