<p>The interim chief executive of Twitter, Jack Dorsey, has said the slowing user growth is "unacceptable", and needs to be worked on. He made the comments on a conference call with investors after the company announced its latest results. Also today: we look at the opportunities for French businesses that could be opened up by the visit of Laurent Fabius to Iran.</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
