Anderson Cooper Special Report "Back to Boston" takes a look at the iconic photographs of the Boston bombings.
For the week ending 17 May, here is a look at the news making waves in America - all in 140 characters or less.
Argentina grapples with legacy of late military leader Videla
The mayor of the Canadian city of Toronto, Rob Ford, denies allegations that he has been caught on video smoking crack cocaine.
With guest Rep. Keith Ellison, John Avlon. Margaret Hoover and Dean Obeidallah discuss the president's scandal trifecta, hope for immigration and what Jolie's revelation mean for women
Stoke City are to investigate after reports that a pig's head was left in striker Kenwyne Jones's locker.
The latest international business headlines from BBC World News.
The inquest into the death of ex-KGB spy Alexander Litvinenko could be replaced by a form of public inquiry to allow evidence about Russia's alleged role in the killing to be heard in secret.