World powers have failed to reach an agreement on the Iranian nuclear issue.

The five permanent members of the UN Security Council - Britain, China, France, Russia and the US - plus Germany, met in New York on Saturday to discuss the matter.

The US and its allies believe Iran intends to develop nuclear weapons. But Tehran maintains its programme is for civilian purposes only.
 
In a bid to resolve the matter, major powers have been pursuing a dual track policy involving engagement and pressure.

In October last year, they gave Iran until the end of the year to accept a UN-brokered deal. The deadline was ignored and the deal rejected.

While the six parties agree that Iran's response was unsatisfactory, they could not reach a consensus on how to deal with Iran.
 
But are sanctions the only way to go against Tehran? And can they work at all?
 
Inside Story, with presenter Imran Garda, discusses with guests: Kenneth Katzman, a Gulf affairs analyst with the Congressional Research Council, Hillary Mann Leverett, a former US national security official, and Sayed Mohammad Marandi, the head of North American studies at Tehran University.  

This episode of Inside Story aired on Monday, January 18.

Source: Al Jazeera