Christiane Knacke

Christiane Knacke (later Driesener then Sommer, born 17 April 1962) is a retired swimmer from East Germany who specialized in the 100 m butterfly. In this event she won a silver medal at the 1977 European Aquatics Championships and a bronze medal at the 1980 Summer Olympics.[1] She was the first woman to break the one-minute barrier in the event, when she clocked 59.78 on 28 August 1977, setting a new world record.[2]

Christiane Knacke

Christiane Knacke in 1978
Personal information
Born	(1962-04-17) 17 April 1962 Berlin, Germany
Height	1.64 m (5 ft 5 in)
Weight	60 kg (130 lb)
Sport
Sport	Swimming
Club	SC Dynamo Berlin
Medal record Women's swimming Representing  East Germany Olympic Games 1980 Moscow 100 m butterfly European Championships 1977 Jönköping 100 m butterfly

In 1989 she admitted to using performance-enhancing drugs against her will.[2]

She married twice, changing her last name to Driesener and then to Sommer.[1] Her daughter Jennifer was born in 1983.[2]