Jack Dorsey: Twitter squared

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Jack Dorsey founded a social media behemoth, but made more cash from card payments. He built Twitter, but was removed as CEO, before going on to found fintech firm Square. BBC business editor Simon Jack and journalist Zing Tsjeng uncover Dorsey’s unusual billionaire biography. He was a kid with a speech impediment who created a website that changed the way the world communicated. Despite being a brilliant coder, he nearly left the tech industry twice. He first retrained as a massage therapist,…