In 2004, young reporter Dan Harris was given the opportunity to fill in for Robin Roberts on Good Morning America. And then live, on-air, he had a panic attack in front of millions of people. This was the catalyst that sent him on a search to address his mental health. He started therapy.
And then, at work, Peter Jennings asked him to start covering religion and spirituality. This led him to Eckhart Tolle, a gaggle of self-help gurus, and, eventually, meditation. The benefits inspired him to write his book, 10% Happier. (He says he wanted to call it The Voice in my Head is an A**hole but was talked out of it.)
Here he is describing his experience on Nightline: