The focus must remain on preventing Iran from ever obtaining such a weapon.

"In any event, time is not working in favor of anyone who wants to prevent Iran from becoming nuclear," he said.

But he said preventing Iran from enriching uranium was beyond the agency's authority.

Is there some way we can prevent Iran from capitalizing on this for a nuclear program?

They also said they were united in their desire to prevent Iran from developing nuclear weapons.

While 26% support use of military force to prevent Iran from developing nuclear weapons.

What strategies might be deployed to prevent Iran from developing nuclear weapons?

He said the measure "sends the wrong signal at a time when the world is trying to prevent Iran from getting the bomb."

These countries expect a lot from us in trying to prevent Iran from developing nuclear weapons.

China is considered crucial if foreign powers hope to use pressure to prevent Iran from developing nuclear weapons.