Bolt lands sprint sweep, Farah the treble double

(L-R) Caleb Mwangangi Ndiku of Kenya, silver medal, Mo Farah of Britain, gold medal, and Hagos Gebrhiwet of Ethiopia, bronze medal, pose on the podium after the men's 5,000 metres event during the during the 15th IAAF World Championships at the National Stadium in Beijing, China, August 29, 2015. REUTERS/Damir Sagolj

BEIJING (Reuters) - Usain Bolt needed a bit of help from his American rivals to win a third gold medal but Mo Farah secured a unique "treble double" all on his own on a dramatic penultimate night of the world athletics championships on Sunday.

While Bolt's place in the sporting pantheon was assured long before he won his 11th world title in the 4x100 metres relay, Farah took his spot among the greatest distance runners of all time with his third straight 5,000 metres title.