Max Pearson presents a collection of this week's Witness History episodes from the BBC World Service.

We hear about the lengths one woman goes to to escape Eritrea, how Zumba was invented by accident and how a giant peace statue on a Japanese island, crumbled into a ghostly ruin.

Plus the arguments then, and the arguments still over the Good Friday Peace Agreement for Northern Ireland, and a picnic for peace that breached the Iron Curtain.

This programme contains descriptions of sexual violence.

Contributors: Martin Plaut - Senior Research Fellow at University of London Semhar Ghebreslassie - Eritrean graduate Beto Perez - Choreographer and inventor of Zumba Jane Morrice - Yes campaigner in 1998 referendum on the Northern Ireland Good Friday Agreement Lee Reynolds - No campaigner in 1998 referendum on the Northern Ireland Good Friday Agreement Yusuke Natsukawa - Local resident of Awaji Island Goro Otsubo - IT worker who enjoys visiting weird sites around Japan Walburga Habsburg Douglas - an organiser of the Pan-European picnic

(Photo: Zumba creator Beto Perez. Credit: Getty Images)