Obama pledges to stop an Iranian nuclear weapon

Washington (CNN) -- Preventing Iran from developing a nuclear weapon is a national security interest of both Israel and the United States, President Barack Obama said Sunday in calling for continued diplomatic efforts but also pledging that all options -- including a military effort -- remain viable.
"All elements of American power" remain an option to stop Iran from becoming a nuclear power, including "a military effort to be prepared for any contingency," Obama told the American Israel Public Affairs Committee (AIPAC), a pro-Israel lobby group.