US troops arrive in Poland as the interim government in Ukraine resumes an offensive against pro-Russia separatists in the east of the country. Ivor Bennett reports on the breakdown of an Easter truce agreement, and how the threat of more sanctions from the US could hit markets.
Journey through quail embryo wins Nikon science video prize
Sequential images of a ten day old quail embryo have won Portuguese biologist, Gabriel G. Martins first prize in this year's Nikon Small World in Motion Photomicrography Competition. The entry was one of hundreds submitted for the contest, which aims to highlight the latest techniques of scientific imaging.
Unicef Ambassador Selena Gomez urges fans to help prevent deaths of one million children in West Africa
Actress, recording artist and designer Selena Gomez is making a heartfelt appeal to her fans to support UNICEF's efforts to save children's lives in the Sahel region of West and Central Africa.
For more information about UNICEF's work in the Sahel region or to make a donation, please visit www.unicef.org.uk