With a career that spans nearly 5 decades in science and technology -- one that includes time at AstraZeneca during its history-making effort to deliver billions of vaccines to countries around the world -- Leif Johansson shares his unique lessons learned. Before he stepped down from his role as non-executive chairman 27 April, he shared with Meet The Leader how his interest in physics has made him a better leader, the key moments that shaped him and even changed his mind, and the advice he's been most grateful for.