It was a friendship first formed at the age of five over a nickname.
원문출처 : http://www.cnn.com/2017/08/03/sport/usain-bolt-nj-walker-london-world-athletics-championships/index.html
원문출처 : http://www.cnn.com/2017/08/03/sport/usain-bolt-nj-walker-london-world-athletics-championships/index.html