US Wrap: Zuckerberg, Cosby and the royal wedding

Facebook founder Mark Zuckerberg is testifying to the US congress. 

Before his testimony Zuckerberg posted on Facebook saying "I will do everything I can to make Facebook a place where everyone can stay closer with the people they care about, and to make sure it's a positive force in the world."

US correspondent Nick Harper spoke to Duncan Garner.

Watch the video.