Do you have a question? Entire books have been written on each of these subjects.
No, Albert Einstein did not help design the atom bomb. He was a theoretical physicist who wrote a letter to President Franklin D. Roosevelt urging him to research nuclear technologies, which indirectly led to the Manhattan Project that developed the atomic bomb.
The atom bomb research and development were conducted under the Manhattan project.
The atom bomb - which was then used on Hiroshima and Nagasaki in Japan.
The Manhattan Project was the secret research program to develop the atom bomb.
Oppenheimer as Einstein was not directly involved in the Manhattan Project he only supported it initially and encouraged Roosevelt to proceed in a letter.
Look up "The Manhattan Project"
Codename was - The Manhattan Project.
The Manhattan Project-
The project to build the atomic bomb was given the secret code-name of "The Manhattan Project", however the bombs were not built in Manhattan. Check wikipedia for details on actual locations.
There were no warnings. The Manhattan Project was a secret. This was the name of the research project that developed the atom bomb.
One was the invention of the atom bomb
There were a number of top secret programs to build an atomic bomb. If you mean the secret plan of the US, it was called the Manhattan Project.