Oscar Pistorius, who in 2012 became the first double amputee to compete on the track at an Olympic Games, on Friday was released from prison on parole, nearly 11 years after killing his girlfriend Reeva Steenkamp. At the 2012 London Olympics, before 80,000 roaring fans and a constellation of camera flashes, it took South Africa’s Pistorius 45.44 seconds to become …