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William A. Nierenberg, SIO Director, second from left, inspects a tungsten drill bit with a group of DSDP officials aboard the Glomar Challenger during acceptance trials in the Gulf of Mexico. Left to right, Project Chief Scientist Melvin N.A. Peterson, Nierenberg, Project Manager Kenneth E. Brunot and James T. Dean, Cruise Operation Manager.

William A. Nierenberg, SIO Director, second from left, inspects a tungsten drill bit with a group of DSDP officials aboard...