National Security Agency (NSA) whistleblower Edward Snowden claimed President Barack Obama "closed the door on investigating systematic violations of law" and "deepened and expanded several abusive programmes".
Snowden said during a live chat on the Guardian website that he waited to release documents until after Obama became President because his election campaign "gave me faith that he would lead us toward fixing the problems".
He said it was seeing a "continuing litany of lies" from senior officials to Congress that led him to leak the classified documents.
More top news
Pretenders singer Chrissie Hynde has been criticised for comments she has made about rape victims.
The Clipper Round The World Yacht Race is due to begin in London today from St Katherine's Dock.
Once a year W11 comes alive with the colour of carnival. Everything you need to know about getting around and what to see in Notting Hill.