Thousands of people worked at Oak Ridge in Tennessee in the 1940s, unaware that this was where the US used to build an atomic bomb.
Oak Ridge in Tennessee is the home of a top-secret US national laboratory. This is one of the three research facilities used by the US to create an atomic bomb .
In the 1940s, thousands of people worked at Oak Ridge National Laboratory .However, they did not know the true purpose of the work they were doing was to build a nuclear bomb - a weapon that caused tremendous damage.
It was not until America threw the first atomic bomb named 'Little Boy' down on Hiroshima, Japan on August 6, 1945, that the workers at the Oak Ridge National Laboratory knew what the work they were doing was making uranium - part of the Manhattan project.
Due to the nature of the work, many people working for the US government at Oak Ridge National Laboratory were exposed to radiation for many years.
Because it is the US-built atomic bomb, Oak Ridge is also known as the "secret city" or "nuclear bomb city".
Oak Ridge National Laboratory is located on an area of over 226 km 2 .For many years, this area was forbidden by strangers.
In addition to the laboratory area used for atomic bomb research and manufacture, Oak Ridge also has 10 schools, 17 restaurants and cafes, 13 supermarkets, 17 churches . It has a maximum capacity. 75,000 people.
Although currently part of Oak Ridge is open to the public, to get inside, visitors must go through military checkpoints with strict rules.
The remaining areas at Oak Ridge are prohibited from entry and are strictly protected.
