21-yr-old runs 60m in 6.34sec, breaks 20-yr-old world record
USA's Christian Coleman broke the 20-year-old world record in the 60 metres sprint after registering a timing of 6.34 seconds at the US Indoor National Championships in Albuquerque on Sunday. Former American sprinter Maurice Greene had held the record of 6.39 seconds. Coleman won the 100 metres silver medal at last year's world championships in London.