When the United States ambassador to Prague, Craig Stapleton, took up his post at the end of August last year, little could he have suspected what horrors lay ahead for his country. Two weeks later, the World Trade Centre was in ruins and thousands of Mr Stapleton's fellow-citizens had been killed in terrorist attacks. Czech Radio's Pavla Kvapilova spoke to US ambassador Craig Stapleton on Tuesday, and began by asking him what he was doing when he first heard about the attack on New York.