<p>A major conference on investment in the mining industry wraps up in South Africa today. Low commodity prices and slumping profits have created a "sombre but sober" atmosphere at the Mining Indaba. Rio Tinto is the latest industry player to report a sharp fall in earnings. Also today, Twitter promises to fix its "broken windows".</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
