Sir Robert Cockburn, a British radar specialist who helped hamper the ability of German radar to spot British and U.S. bombers during World War II, died March 21 in Aldershot, southwest of London. He was 85. Sir Robert was born in Belford, Northumberland, studied at London University and did research on communications and radar from 1937 to 1945. He headed a group of engineers and scientists who worked on measures to defeat Germany's electronic systems, including radar.

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