America in the 1950s: a time when the front door was left unlocked and the dream of a house with a lawn seemed accessibleto everyone. It was also, however, the time of the McCarthy witch-hunts and racial segregation. In the first of two talks, Raymond Seitz , former US Ambassadorto the UK, looks back at what made that decade so special for Americans -then and now. Producer Maria Balinska Rptd on Saturday