AfricaLink on Air - 03 March 2014To play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoCaldwell, Mark03/03/2014March 3, 2014South Africa's paralympian Oscar Pistorius pleads not guilty to murdering girlfriend +++Kenyans celebrate Lupita Nyong'o's Oscar award win+++Researchers discover reason for mosquito resistance to insecticideshttps://p.dw.com/p/1BIrYAdvertisement