WASHINGTON -- Vice President Joe Biden seemed to give Israel a green light for military action to eliminate Iran's nuclear threat, saying the U.S. "cannot dictate to another sovereign nation what they can and cannot do."

Israel considers Iran its most dangerous adversary and is wary of hard-line Iranian President Mahmoud Ahmadinejad, who just won a disputed re-election. He repeatedly has called for Israel to be wiped off the map and contends the Holocaust is a "myth."

Israel and the U.S. accuse Iran of seeking to develop weapons under the cover of a nuclear power program. Iran denies that.

The government of Prime Minister Benjamin Netanyahu says it prefers to see Iran's nuclear program stopped through diplomacy but has not ruled out a military strike.

"I have been, for some time, concerned about any strike on Iran. I worry about it being very destabilizing, not just in and of itself but unintended consequences of a strike like that," Mullen said on CBS' "Face the Nation."