In 1994 the world's first genetically engineered food went on sale in the US. It was a tomato, called the 'Flavr Savr' which stayed fresh for up to 30 days. It was developed by an American biotechnology company called Calgene and Claire Bowes has been speaking to the former CEO, Roger Salquist, about the ten year journey to get the genetically engineered tomato to market. Photo: Roger Salquist, former Chairman and CEO of Calgene (courtesy of Roger Salquist)