Prominent owner and pioneering human heart surgeon Mark DeDomenico passed away Saturday aged 87, leaving behind a storied legacy in human and equine health. "The first thing he taught me when I went to work for him was that the word 'can't' isn't in the vocabulary," said Mike Puhich, trainer and director of horse operations at the Pegasus Training and Rehabilitation Center in Redmond, Washington, owned by DeDomenico. "He'd say 'I want this, this, and this.' And I'd say, 'Doctor Mark, I can't do that.' And he'd say, 'I know,...