American business magnate Elon Musk has flown to see boxer Floyd Mayweather take on Mexico's Saul Alvarez, on a private jet with Justin Bieber, according to his Twitter.
Venture capitalist Shervin Pishevar also joined Musk and his ex-wife Talulah Riley and his brother Kimbal.
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An eight-year-old boy who had to have both hands amputated as a toddler has been given the world's first double hand transplant.
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