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1949 – August 29 – The Soviet Union conducts its first atomic test, RDS-1 (nicknamed Joe 1 by the Americans). [19] 1949 – September 3 – U.S. atmospheric monitoring flights begin detecting effects of the Soviet test. [19] 1949 – September 23 – President Truman announces that the Soviets have conducted an atomic test. [19]
The "war on terror" that began with the September 11 attacks has been claimed by some to be World War III [106] or sometimes World War IV [100] [107] (assuming the Cold War was World War III). Others have disparaged such claims as "distorting American history". While there is general agreement amongst historians regarding the definitions and ...
9 February – The 9am and 5pm news bulletins on BBC Radio 3 are replaced by a ten-minute bulletin from the BBC World Service. The bulletins are titled World Service News. 1988. 15 January – After less than a year, the World Service news bulletins broadcast on Radio 3 are axed.
The reactor's development was part of the Manhattan Project, the Allied effort to create atomic bombs during World War II. It led to the building of larger single-purpose production reactors, such as the X-10 Pile, for the production of weapons-grade plutonium for use in the first nuclear weapons.
The components of a B83 nuclear bomb used by the United States. This is a list of nuclear weapons listed according to country of origin, and then by type within the states. . The United States, Russia, China and India are known to possess a nuclear triad, being capable to deliver nuclear weapons by land, sea and
BBC Radio 1 stops borrowing BBC Radio 2's FM frequencies on Sunday evenings after 7pm. The UK Top 40 is the only remaining programme left to continue to borrow Radio 2's frequencies between 5pm and 7pm on Sundays. 24 November – BBC Radio 1 starts broadcasting on FM in Belfast and Oxfordshire with a simulcast of Top of the Pops. [32]
CONELRAD radio information systems were adopted, whereby the commercial radio sector (later supplemented by the National Emergency Alarm Repeaters) would broadcast on two AM radio frequencies in the event of a Civil Defense (CD) emergency. These two frequencies, 640 and 1240 kHz, were marked with small CD triangles on the tuning dial of radios ...
It tested the first nuclear weapon on 16 July 1945 ("Trinity") at 5:30 am, and remains the only country to have used nuclear weapons in war, having bombed the Japanese cities of Hiroshima and Nagasaki in the closing stages of World War II. The project expenditure through 1 October 1945 was reportedly $1.845–$2 billion, in nominal terms, [46 ...