Ten years ago, Sir Jeremy Greenstock was UK ambassador to the UN, while Sir David Manning was foreign policy advisor to the British Prime Minister. Now on the Council and Panel of Senior Advisors to Chatham House, both were in New York on 11th September 2001.

In this special audio feature they and other Chatham House experts talk about the events of that day, and the decade since.

When SARS broke out, David Heymann was in charge of infectious diseases, at the World Health Organisation. Now head of Global Health Security at Chatham House, he describes how the outbreak was handled in Geneva, and we look at more personal reception of the outbreak in China.