World champion swimmer dies at 26 after having massive heart attack as he showered at training camp
- Swimmers found him dead when he didn't come out of shower after training in Flagstaff, Arizona
- In his final tweet, he wrote of looking forward to returning to 'the most beautiful city in Norway, Bergen'
- He was world 100m breaststroke champion and silver medalist at Beijing Olympics
- Norwegian Alexander Dale Oen dedicated World Championship Gold to the 77 victims of mass murderer Anders Breivik
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