He is the fastest man in Paralympic sport.
Jason Smyth - the fastest man in Paralympic sport - has announced his retirement at the age of 35.
Smyth won six Paralympic gold medals including 100 metre and 200 metre doubles at the Beijing and London Games.
The visually-impaired sprinter from Derry stayed unbeaten during a Paralympic career which began at the 2005 European Championships.
He also won nine world titles and six European gold medals.