Atomic Bombs

The atomic bombings of Hiroshima and Nagasaki in August 1945 resulted in significant loss of life. In Hiroshima, it is estimated that around 140,000 people died by the end of 1945, while in Nagasaki, the death toll was approximately 74,000. These figures include immediate casualties and those who died later from radiation-related illnesses. The total combined death toll from both bombings is generally estimated to be between 200,000 and 250,000.

Stalin did not fully agree with Truman regarding Churchill's complaints about U.S. atomic policy. While Truman was concerned about the potential for the atomic bomb to create a power imbalance and provoke tensions, Stalin was more focused on asserting Soviet power and influence in the post-war order. Their differing perspectives highlighted the growing rift between the U.S. and the Soviet Union, which ultimately contributed to the onset of the Cold War. Stalin's approach was more about leveraging the situation to enhance Soviet security and status rather than aligning with U.S. concerns.

The Manhattan Project.

Atomic bombs work by initiating a chain reaction of nuclear fission, where the nucleus of an atom is split into smaller parts, releasing a tremendous amount of energy in the process. This energy is released in the form of heat, light, and shockwaves, causing widespread destruction and devastation.

The United States tested atomic bombs primarily at the Nevada Test Site, now known as the Nevada National Security Site, starting in 1951. Additionally, the first atomic bomb was detonated during the Trinity Test in New Mexico on July 16, 1945. Other tests were conducted in the Pacific, particularly at the Bikini Atoll and Enewetak Atoll in the Marshall Islands, during the 1940s and 1950s.

The US has performed almost 10,000 nuclear tests, one can assume that the USSR has also performed a similar number. No other countries have performed more than a couple hundred nuclear tests.

Not all of these tests produced a nuclear explosion (e.g. some failed, some were "safety tests" designed to prove that safety systems would prevent an unwanted explosion, some were subcritical tests), but even then we are talking about many thousands of nuclear explosions. Much of this information is still classified and thus not publicly available.

Then there were the three bombs exploded during World War 2: the Trinity Test in New Mexico and the two bombs dropped in combat over Japan (Hiroshima & Nagasaki).

The very instant the bomb dropped 800,000 people died instantly. The ones who lived had burns and radiation poisoning. Even today there are people who are still suffering.

No. I have to think it won’t.

While Albert Einstein did not directly contribute to the development of atomic bombs, his famous equation E=mc^2 did provide the theoretical foundation for the release of nuclear energy in such devices. He signed a letter to President Franklin D. Roosevelt in 1939, warning about the potential for Nazi Germany to create such a weapon and urging the U.S. to begin its own research.

The Marines developed the "Leapfrogging" method to achieve speed and dispersion on a potentially atomic battlefield. This method involved advancing troops in a staggered formation to quickly move across the battlefield while minimizing the risk of being hit by atomic weapons.

It made the planned invasions of Japan at the end of 1945 and the spring of 1946 unnecessary, shortening the war by at least a year (and possibly as much as 10 years, depending on the sources you look at). It also caused the USSR to end peace negotiations with Japan and begin their already planned invasion of northern Japan sooner than they had agreed to at Potsdam (which according to some sources may have been more significant in forcing the Japanese surrender than the bombs themselves were).

Too many to list.

When the Manhattan Project was first started in 1942 with the goal of building atomic bombs the purpose of the new weapon was as a defense against the possible Nazi use of the atomic bomb that it was believed they had already been working on since 1939 and were likely to soon have in their arsenal. It was expected that following the German attack on the USSR in 1941 that the first Nazi use of atomic bombs (once they began building them) could be on either Great Britain or the USSR and that such an attack would result in a quick collapse and surrender of the country attacked with them. This would result in the US fighting the war against both Germany and Japan alone with only the oceans to delay the eventual attack by Germany on the US with atomic bombs (or having to surrender to Hitler's threats of their use without resistance in a futile attempt to "save American lives"). At least if the US had atomic bombs we might have some chance of fighting back against a Nazi atomic bomb used on us.

However by the time the Manhattan Project had actually succeeded in building atomic bombs in the summer of 1945 Germany had already surrendered and all the original assumptions of the project had fortunately been proved invalid. However there was still the war with Japan, which although it was obvious to everyone on both side that Japan must eventually surrender the war was moving slowly and with Kamikaze attacks and when entire Japanese units had to be killed to the last man as they would not surrender even when obviously defeated. If this continued the Japanese "D-Day" invasion would clearly have very very high casualties on both sides before the Japanese would actually surender. So the atomic bomb was now given the new purpose of an offensive weapon to shorten the war with Japan (and hopefully save lives).

• in an airplane called a bomber
• on a rocket
• in an underwater torpedo
• in an underwater depth charge
• from an artillery piece
• in a backpack carried by a man
• buried underground as a landmine
• from a jeep mounted recoilless gun
• etc.

The primary reason was that Edward Teller hated him. A secondary reason was Joseph McCarthy's communist witch hunts at the time and that fact that both Robert Oppenheimer's wife Kitty and brother Frank had been registered members of the communist party during the 1930s (like many in universities at the time).

A US atom bomb nearly exploded in 1961 over North Carolina that would have been 260 times more powerful than the device that devastated Hiroshima, according to a declassified document. It became a chaos with the explosion and the fire and smoke. It was an error but the plutonium core was not in the bomb until the order was given to arm the devise.

Only the US. Germany had a program, but it was never completed.

a nuclear explosion

gunpowder+fire=explosion.

Roosevelt was a bit too open about the general concept of the atomic bomb. Stalin took in everything he heard and soon Russia or the Soviet Union had nuclear weapons also, making the US and the Soviet Union the two big world superpowers, with stockpiles of nuclear weapons that could destroy the Earth. I'm sure the Soviet Union believed at the time that since they were developing their own nuclear weapons, they weren't all that alarmed. To this day, after the Soviet Union crumbled, no one knows where some warheads have gone. It was easy for a terrorist to snatch a nuclear bomb or two from the unguarded Soviet stockpiles abandoned when the Soviet Union became no more.

The radius of total destruction in Hiroshima was over 1 mile, with destruction of all flammable buildings within a 4.7 square mile area, and some outlying areas by the firestorm that followed two or three hours after the blast.

The radius of destruction in Nagasaki was a little less than 1 mile, because the bomb fell northwest of the city center, primarily impacting the Urakami River valley. The destruction extended to almost everything flammable within 2 miles to the north or south along the river valley.

He used spies.