The security service will look into how it handled tip-offs about the threat posed by Salman Abedi.
The German chancellor says Europe must "fight for its own destiny" at an election campaign event.
More than a third of departures are cancelled after an IT crash causes a second day of disruption.
Tributes have continued to pour in for the men who died defending a Muslim teenager on Friday.
The majority of the events at the Nyansapo Festival will be open only to black women.
Traditional subjects are on their way out - and topics like climate change are on their way in.
The Palme d'Or is awarded to an art world satire starring Dominic West and Elisabeth Moss.
Shots were fired in three separate locations, and a deputy sheriff is among those killed.
Mr Zuma is under pressure because of corruption scandals, cabinet sackings and a faltering economy.
Manchester United's Paul Pogba has shared a picture of himself in Islam's holiest city.
Security chief John Kelly says terrorists are obsessed with the idea of attacking a US plane.
France's president says his white-knuckle encounter with the US leader was designed to get respect.
Civilians are hardest hit in the final phase of Iraq's military assault on IS militants, says the UN.
Delivering a lecture at the Hay Festival, the actor said society could face "dire consequences".
The latest global news, sport, weather and documentaries
Stories from around the world
Fernando Alonso's bid to win the Indy 500 at his first attempt ends with an apparent Honda engine failure as Takuma Sato takes victory.