Photo 1: Tokyo 1964 – Getty Images, Photo 1335873624 – Photo by Archive Photos/Hulton Archive/Getty Images

Photo 2:  Martin Lel and Sammy Wanjiru – Getty Images, Photo 82530072 – Photo by Julian Finney

Photo 3: Nicholas Okong’o Okoth – Getty Images, Photo 1330369137 – Photo by Buda Mendes

Photo 4: Kipchoge Keino – Getty Images, Photo 635270524 – Photo by Eamonn M. McCormack/Getty Images for Laureus

Photo 5: Kipchoge Keino – Getty Images, Photo 1578747 – Photo by Getty Images

Photo 6: Kipchoge Keino – Getty Images, Photo 357756 – Photo by Getty Images

Photo 7: Eliud Kipchoge – Getty Images, Photo 1332939911 – Photo by Lintao Zhang

Photo 8: David Rudisha – Getty Images, Photo 589987076 – Photo by Alexander Hassenstein

Photo 9: Faith Chepngetich Kipyegon – Getty Images, Photo 590508358 – Photo by Ian Walton

Photo 10: Ezekiel Kemboi – Getty Images, Photo 176555491 – Photo by Cameron Spencer

Photo 11: Paul Tergat – Getty Images, Photo 944763 – Mandatory Credit: Stu Forster /Allsport

Photo 12: Ben Jipcho – Getty Images, Photo 1051838298 – Photo by Tony Triolo /Disney General Entertainment Content via Getty Images

Photo 13: Team Kenya – Getty Images, Photo 1234274054 – Photo by Erick W. Rasco/Sports Illustrated via Getty Images

Photo 14: Tokyo Olympics – Getty Images, Photo 1234134284 – Photo by Lintao Zhang

Photo 15: Team Kenya, Athens 2004 – Getty Images, Photo 51213148 – Photo by Stu Forster

*All Olympic Footage / Images / Audio available in this production is copyright of and reproduced only with the consent of the International Olympic Committee. All Olympic Logos / Poster available in this production is copyright of and reproduced only with the consent of the International Olympic Committee