The social media giant has unveiled Libra, a cryptocurrency payment system that, if it fails, could take down the global economy. Governments must intervene, says Katharina Pistor.

The discovery came after a series of glass-filled pipe bombs targeted Hillary Clinton, former president Barack Obama and other prominent Democrats.

Democrats demanding action on gun control continue to stage a sit-in on the floor of the US House of Representatives with one saying she would stay "until hell freezes over".

United Nations secretary general Ban Ki-moon told members of the US Congress that the world body was committed to helping Haiti overcome a cholera epidemic, even though it is refusing to pay compensation to victims who blame UN peacekeepers for starting the outbreak.

Ousted Haitian President Jean-Bertrand Aristide is today expected leave Central African Republic on a long-haul flight to Jamaica, returning to the Caribbean for the first time since fleeing into exile weeks ago.