North Korea performed a controversial intercontinental ballistic missile test.
The United States and Russia signed the Moscow Treaty, agreeing to limit their nuclear arsenals.
French President Jacques Chirac announced France's nuclear test program had finished.
Nearly one million people protested for the disarmament of nuclear weapons in Central Park, New York City.
An unidentified double flash of light was detected over the Indian Ocean south of Africa.
The US started plans to construct its first nuclear battlefield weapon.
India had their first successful nuclear bomb test.
The largest US underground bomb was detonated on Amchitka Island, a remote Alaskan island.
China performed its first thermonuclear test.
The Outer Space Treaty was signed to prevent the use of nuclear weapons being utilized in space.
France became the fourth nuclear-capable nation following its successful Gerboise Bleue atomic test.
The Soviet R-7 Semyorka, the world's first Intercontinental ballistic missile, became operational.
The US SM-65 Atlas missile completed the first successful intercontinental ballistic missile launch.
A nuclear bomb was lost off the coast of Georgia, US.
Nine thousand scientists from 43 nations signed a petition to ban nuclear testing.
The first private research atomic reactor opened in Chicago, Illinois, US.
The US tested the TX-17 thermonuclear bomb for the first time in Bikini Atoll of the Marshall Islands.
The United States conducted its first and only nuclear artillery test at the Nevada Test Site.
President Truman announced to the people of America that they successfully developed a hydrogen bomb.
British Prime Minister Winston Churchill went public that Britain had its first atomic bomb and planned to test it in Australia by the end of the year.
An atomic bomb explosion was aired on TV for the first time.
The first of 126 nuclear tests started at the Nevada Test Site.
Albert Einstein warned against hydrogen bombs on the ''Today with Mrs. Roosevelt" weekly TV show.
The Soviet Union started mass producing the AK-47 assault rifle.
Citizens of Bikini Island evacuated for nuclear testing.
The world's first atomic bomb was detonated.
Adolf Hitler signed the order to develop the V-2 rocket as a weapon during World War II.
US President Franklin D. Roosevelt received a letter from Albert Einstein detailing the possibility of atomic weapons.
Machine guns were fired from a US airplane for the first time.
Machine guns were used for the first time in a battle in Omdurman, Sudan, Africa.
Smith and Wesson patented the first metal bullet cartridges.
Samuel Colt patented the multi-shot revolving cylinder gun.
