BBC Radio 4 - The World Tonight

75th anniversary of liberation of Auschwitz

Elderly survivors of Nazi death camp joined by world leaders at Polish ceremony

Impact of attack on Iraqi military base initially played down by administration

China bans people from transport networks and public places in several major cities.

UN experts: Saudi Crown Prince might be involved in hacking of Amazon founder's phone

Only the third such proceeding against a president in American history

World Health Organisation to convene its emergency committee

Attempt to end civil war between UN-backed government and rebel forces

Charges read out in US Senate and presiding judge sworn in

President’s impeachment trial expected to start on Tuesday 21 Jan

Britain, France and Germany say Tehran is breaking 2015 nuclear deal