Shortly after the first Soviet nuclear bomb test on August 29, 1949, United States spy planes detected evidence of radioactivity from the blast. In this statement, President Truman revealed to the public for the first time that the Soviet Union had built and successfully detonated a nuclear bomb.

The nuclear research activities of UPhTI were concentrated in Laboratory No. 1 which was established as a part of institute in 1946. This archival document illustrates the list of its activities.

The Indian Atomic Energy Commission meets with the French High Commissioner for Atomic Energy Joliot-Curie to discuss nuclear cooperation between India and France.

Joliot-Curie, French High Commissioner for Atomic Energy, offers to share technical information with India on the purification of uranium, graphite reprocessing and designs of a low power reactor in exchange for India’s export to France of thorium, beryllium and mineral oil for the manufacture of graphite.

Zhou Enlai and Vyshinshy discuss the exchanges of land made in August 1945 in Manchuria and Inner Mongolia. The relinquishing of Port Arthur (Lüshunkou) and Dalian are mentioned.

On US national security policy at the beginning of the Cold War. Includes an assessment of the conflict between the United States and the Soviet Union, as well as US and Soviet nuclear weapons capabilities.

Notes from discussions with Homi Bhabha, Chairman of the Indian Atomic Energy Commission, to negotiate the contract for nuclear cooperation between India and France.

In this document, Andrei Sakharov, "father" of the Soviet thermonuclear bomb program, positively assesses Oleg Lavrientiev's ideas about the Soviet thermonuclear program, which were expressed in Lavrientiev's previously-written letters to Soviet leaders.

Roger Makins of the British Foreign Office informs Michael Perrin, Deputy Controller for Atomic Energy, about negotiations between India and the United States and India and France for nuclear cooperation.

F.C. How of the Ministry of Supply replies to Roger Makins of the Foreign Office regarding negotiations for British nuclear cooperation with India.

The French Ministry of Foreign Affairs reports that an agreement has been signed for cooperation between India and France for nuclear research.

Summary report on the use of German specialists for Soviet rocket development

British Ambassador Oliver Harvey reports a conversation with the Director of the French Atomic Energy Commission Jules Guéron on the details of Franco-Indian nuclear cooperation.

An inscription made by Mao Zedong related to China's germ warfare allegations against the United States.

John D. Cockcroft, head of the British Atomic Energy Research Establishment, writes to Homi J. Bhabha, Chairman of the Indian Atomic Energy Commission, informing him that the British will not be assisting India with its beryllium experiements since India has already made agreements with the French Atomic Energy project.

Council of Ministers decree approving development of several intercontinental missiles

On the creation of a long-range missile to carry nuclear warheads