“What we want to do is to make sure that we provide multiple and broad perspectives and not draw firm conclusions, but to leave those conclusions to our visitors, giving them the sovereignty of thought,” Manhattan Project National Historical Park Superintendent Kris Kirby said, according to the South China Morning Post.

The park was set up by the U.S. government in 2015 and outlines the development of the nuclear bombs that ended World War II. Museum facilities are being expanded in Tennessee, New Mexico and Washington state, where the research was undertaken.