who was the head of the project?
Major General Leslie Groves
Manhattan Project
From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the U.S. Army Corps of Engineers.
what is trinity nuclear test? It was the code name of the first detonation of a nuclear device. when did the test start? July 16, 1945. did it have any other code name? No which organizations were involved in it? E-9 group,  National Safety Council, etc. what is the council about? It is a nonprofit, public service organization promoting health and safety in the United States of America. when was the council established? 1913 is there a month dedicated to it? Yes,  June where is the head office of the council? Itasca, Illinois was the trinity part of the manhattan project? Yes
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Manhattan Project [SEP] Introduction
The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom (which initiated the original Tube Alloys project) and Canada. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the U.S. Army Corps of Engineers. Nuclear physicist Robert Oppenheimer was the director of the Los Alamos Laboratory that designed the actual bombs. As engineer districts by convention carried the name of the city where they were located, the Army component of the project was designated the Manhattan District; "Manhattan" gradually superseded the official codename, Development of Substitute Materials, for the entire project.