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"Barack Obama is to give a televised introduction to Cartoon Network&amp;#039;s documentary Stop Bullying: Speak Up. Stop Bullying: Speak Up features celebrities including Venus Williams, Hope Solo and Chris Webber sharing stories of bullied children and the people who have helped them.   President Obama will open Sunday&amp;#039;s premiere of the film with a call to end bullying nationwide by encouraging children to have a more open mind to their fellow students. BMX bike rider Matt Wilhelm, basketball star Lisa Leslie and NASCAR stars Jeff Burton, Joey Logano and Trevor Bayne also appear in the documentary. Obama&amp;#039;s involvement is just his latest attempt to help end childhood bullying in the US. The politician held a teen bullying summit in Washington DC last year and also recently met with Lady GaGa following the suicide of a 14-year-old fan. Stop Bullying: Speak Up airs Sunday, March 18 at 5.30/4.30c on Cartoon Network. It was also uploaded onto the film&amp;#039;s official website, Facebook, iTunes and YouTube. &amp;gt; Barack Obama jokes with Aziz Ansari: &amp;#039;I have more Twitter followers&amp;#039; &amp;gt; Bill Maher donates $1m to Barack Obama political support group Watch a preview of Stop Bullying: Speak Up below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/ustv/news/a370894/barack-obama-to-introduce-cartoon-network-anti-bullying-documentary/>