Assisted suicide: as the people of Zurich in Switzerland prepare to vote on the issue, Imogen Foulkes tells a moving story about a couple who believed they had a right to decide on a date for death. Fergal Keane considers the historical significance of the forthcoming visit, by Queen Elizabeth 2, to the Republic of Ireland. Andrew Harding is in the Libyan rebel stronghold of Benghazi where, he says, people are determined to continue their fight against Colonel Gaddafi and to emerge with their country still united. Matthew Teller visits the city of Taif in Saudi Arabia, a place where many Saudi people spend their holidays while James Painter's in Peru asking questions about the freshwater Amazon dolphin including: why is it pink?