<p>The Brazilian oil giant Petrobras says it will improve its "internal policing" after being hit by a corruption scandal that's wiped billions off the value of the firm. Twenty-three people were arrested on Friday on suspicion of money laundering and graft involving the company. President Dilma Rousseff said the investigation could change the country forever. Also today: Toyota unveils its first emission-free car.</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
