Mullen warned it would be “incredibly dangerous” for Iran to achieve nuclear weapons and declared there is no reason to trust Teheran’s statements that it seeks a peaceful nuclear program, especially after the secret nuclear facility at Qom was discovered, he said.
 

Mullen said there was no reason to expect Iran to conform to international norms, given its past behavior, but he declined to describe what measures the U.S. was considering. He has often said that all options remain on the table.
 

He explained that the hardest part about trying to decide what to do about Iran is how much the U.S. does not know about the country's nuclear progress.
 

Mullen spoke Monday shortly after returning from a visit to Pakistan and Afghanistan and a stopover in Israel, where he discussed Iran’s ongoing defiance of the international community concerning its nuclear program.
 

On Sunday, head of the CIA director Leon Panetta said he estimates that Iran has adequate enriched uranium to produce two nuclear bombs, but believes they are at least a year away from being able to carry it out.
 

The U.N. Security Council approved new sanctions against Iran earlier this month. Congress and the European Union followed with additional measures aimed at discouraging Iran from continuing its uranium enrichment program, which they fear could be used to produce a nuclear weapon.

(AP contributed to this report)