A Canadian alternative media journalist, documentary producer, and political activist. Founder of the SOURCES directory, now online at www.sources.com. Zwicker was an award-winning newspaper writer for the Globe and Mail, Toronto Star and The Detroit News. His commentary "Facing the Fourth Estate" was aired weekly on 18 CBC stations. He taught journalism for seven years at Ryerson University and worked for 15 years at Vision TV, finishing with his own weekly program, "Media File."