The President of the United States of America takes pleasure in presenting a Gold Star in lieu of a Second Award of the Legion of Merit to Captain (MSC) Walter F. Mazzone, United States Navy, for exceptionally meritorious conduct in the performance of outstanding services to the Government of the United States from 1 February to 31 October 1965 as the Senior Physiologist during Project SEALAB II. Responsible for the physiological investigations and the decompression of the aquanauts after their return to the surface, Captain Mazzone personally subjected himself to all experimental conditions and insured that all aquanauts could be safely decompressed. His exceptional knowledge of physiology and the requirements for saturation diving practices was superbly demonstrated.