Mount Agung: Volcano Alert at Highest Level

The Indonesian authorities have urged more than 100,000 people living near the Mount Agung volcano on the island of Bali to move to safety, due to fears that an explosive eruption could be imminent. We discuss why it is hard to predict when exactly volcanoes erupt.

Also in the programme: Britain's Prince Harry is to marry the American actor, Meghan Markle; and why an Iranian wrestler apparently lost on purpose in order to avoid facing an Israeli opponent.

(Image: Mount Agung spews volcanic ash into the sky in Karangasem in Bali. Credit: Andri Tambunan/Getty Images)