When I took office, Bob Gates had already served under seven Presidents during an illustrious career that spanned four decades.

WHITEHOUSE: Armed Services Farewell Tribute for Secretary Gates

In what has already been an eventful week for football fans across the world, David Beckham, 38, has announced his retirement from professional football, ending an illustrious career that spanned 20 years and four countries.

FORBES: David Beckham Announces Retirement

Gebrselassie has broken 27 world records during an illustrious career, and collected two Olympic gold medals and four world titles.

BBC: Haile Gebrselassie to make Great North Run debut