BBC World service Published by BBC World service by BBC World Service US and Britain must provide leadership in the modern world. Listen 31 min Queue Download this audio Want to embed this player? Use the code below. More info. <iframe frameborder="0" scrolling="no" height="130" width="100%" src="https://www.wnyc.org/widgets/ondemand_player/wnyc/#file=/audio/json/733311/&share=1"></iframe> Share on Facebook Share on Twitter Email a Friend British Prime Minister stresses Special Relationship in US speech, Scientists have given details of their first attempts to engineer cells containing both animal and human material, The German football fairy tale that's divided the country.