sentences:  Knowles was one of 34 journalists and 26 "New York Times" employees subpoenaed by the Senate Internal Security Subcommittee in November 1955.The subpoenas were a result of journalist Winston Burdett's testimony in June 1955.Knowles was one of the more cooperative witnesses the senators encountered as a number of other journalists invoked the Fifth and First Amendments to avoid answering questions, many of them losing their jobs as a result.