Water.org co-founders Matt Damon and Gary White are committed to providing the entire world with clean drinking water. Damon and White join CBSN on World Water Day to discuss the initiative.

London police are reporting injuries after an attack outside of Parliament in London. There are reports that a police officer was stabbed and a vehicle rammed pedestrians on the Westminster bridge. Politico's chief U.K. correspondent Tom McTague joins CBSN with the latest.

The Daily Mail's Quentin Letts was inside Parliament in London when an apparent attack took place. Letts joins CBSN to describe what happened.

London's Parliament is on lockdown after a police officer was stabbed and the suspect shot outside of the building. Police say they are treating it as a terrorist incident. CBS News correspondent Jonathan Vigliotti has the latest from London.