BLITZER: A new clue to a fire aboard a U.S. nuclear submarine. Lisa Sylvester is monitoring that and some of the other top stories in THE SITUATION ROOM right now. Lisa, what's going on?</s>SYLVESTER: Wolf, the Navy says a vacuum cleaner may have sparked a fire on the "USS Miami" last month at a shipyard in Maine. No one was hurt, but damage to the nuclear sub is estimated at more than $400 million. The Navy says the Miami's nuclear components weren't affected and there were no torpedoes on the sub at the time. More options for iPhone fans, Virgin Mobile is the latest wireless company to announce that it will now carry the iPhone. It is also the second to offer a prepaid plan. For four years, iPhones were exclusive to AT&T;, but since last year, six companies have started offering service for the Apple devices. And take a look at this video from China where a toddler wandered on to a balcony and wound up with his head stuck in the railing leaving him dangling four stories up. A man risked his own life to save the boy walking along a narrow ledge one floor below to reach him. You can see the amazing pictures there. He managed to set the child free and bring him safely inside. Frightening stuff there, but wow, what a hero that guy is, Wolf.</s>BLITZER: He certainly is. Glad that little kid and the man, that everyone is just fine. Thank you, Lisa.
Vacuum Cleaner Blamed For Nuke Sub Fire; Virgin Mobile To Offer iPhones