http://adf.ly/1SZdI2, http://adf.ly/1XIsTW, http://www.ctvviet.com, http://www.nhac24.com <br />With international military tensions ratcheting up in and around the Black Sea, we're exploring why this body of water is so important to the region. And we're taking you aboard a U.S. nuclear submarine to find out what life is like under the surface. Fridays are awesome on CNN Student News!
