sentences:  From 1964 until 1975, he served in H. M. Diplomatic Service.In 1975, he married American photographer, writer, and illustrator Wendy Whitney Cortesi, daughter of John Sargent Whitney of Evergreen, Colorado and jewellery designer Minna Reese Marston.The family lived in Washington, D.C., where he worked for the Trilateral Commission (Deputy Director 1975–1976), the Carnegie Endowment for International Peace, and the Aspen Institute (Executive Vice-President 1989–1997) before becoming President of the Atlantic Council of the United States (1999–2005).