The U.S.-Korea Institute at the Johns Hopkins School of Advanced International Studies said the latest satellite photos taken two weeks ago suggest the Sinpo-class ballistic missile submarine (SSB) remains seaworthy and there were signs of testing activity near the submarine.
![2_Sinpo-16-0105-990x537[1]](http://alert5.com/wp-content/uploads/2016/01/2_Sinpo-16-0105-990x5371-500x271.jpg)