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France's Renaud Lavillenie reacts justs after breaking Sergei Bubka's 21-year-old indoor pole vault world record on February 15, 2014, in Donetsk, at the same Donetsk meeting where the Ukrainian great set the old mark in 1993. Lavillenie, the Olympic champion, vaulted 6.16 metres at his first attempt to improve the record by one centimetre and to make the moment sweeter Bubka was present to witness it and was among the first to congratulate him. AFP PHOTO/ ALEXANDER KHUDOTEPLY (Photo credit should read Alexander KHUDOTEPLY/AFP/Getty Images)

France's Renaud Lavillenie reacts justs after breaking Sergei Bubka's 21-year-old indoor pole vault world record on February 15, 2014, in Donetsk, at the same Donetsk meeting where the Ukrainian great set the old mark in 1993.  Lavillenie, the Olympic champion, vaulted 6.16 metres at his first attempt to improve the record by one centimetre and to make the moment sweeter Bubka was present to witness it and was among the first to congratulate him.   AFP PHOTO/ ALEXANDER KHUDOTEPLY        (Photo credit should read Alexander KHUDOTEPLY/AFP/Getty Images)