<p>The US Secretary of State condemns "unspeakable human costs" amid four months of civil war in South Sudan. During a visit to the capital Juba, he urged President Salva Kiir to head to the negotiating table with his rival Riek Machar.</p><br /><br />Visit our website:<br />http://www.france24.com<br /><br />Like us on Facebook:<br />https://www.facebook.com/FRANCE24.English<br /><br />Follow us on Twitter:<br />https://twitter.com/France24_en
