A US destroyer forced back a North Korean freighter ship that was possibly on its way through the South China Sea to Burma (Myanmar) with military cargo. It is not clear if the cargo was nuclear or conventional weaponry.
The US and South Korean deployment of new vehicles and robots for defense against nuclear weaponry reflects fears that North Korea, in a leadership struggle and desperate for food, might be tempted to use them.
Following two days of talks in Geneva that failed to address concerns about Iran's nuclear program, the US is signaling its readiness to seek even harsher sanctions.
Arab nations finally won agreement from the US and the other nuclear powers to take the first step toward banning nuclear weapons from the Middle East. Now, the next move is Israel's.
The security summit that begins in Washington Monday aims to ensure that nuclear weapons and weapons-grade materials are put under lock and key to prevent terrorists from getting them.
Israeli Prime Minister Benjamin Netanyahu will send a deputy to Obama's nuclear security summit next week. He decided not to attend himself after learning that some Arab countries planned to press Israel to sign the Nuclear Non-Proliferation Treaty.
New Security Council resolution doesn't name Iran or North Korea. But France's Sarkozy singles them out, suggesting more must be done to address nuclear violators.
The US also hopes to establish a diplomatic presence in Tehran for the first time in 30 years, according to the Guardian newspaper.