State prosecutor Gerrie Nel, middle, questions a ballistics police officer in the witness box captain Christiaan Mangena, far right, during the Oscar Pistorius trial at the high court in Pretoria, South Africa, Wednesday, March 19, 2014. Pistorius is charged with shooting dead his girlfriend, Reeva Steenkamp, through the door, exhibitted in court foreground, on Valentines Day in 2013. (AP Photo/Themba Hadebe, Pool)