https://www.youtube.com/watch?v=l-il82AfPGY' - 'Ben Johnson Story' - National 4
https://www.youtube.com/watch?v=Vv3JfGq8kYI - 'Stop at Nothing - The Lance Armstrong Story'
http://www.bbc.co.uk/sport/0/athletics/29515182 - 'Justin Gatlin: why US sprinter's success is bad
for athletics'
