I love that article. None of those "conspiracies" have the hallmark of modern day conspiracy theories. They all acted exactly like things go. People hid something, someone found, exposed them, and because they made logical sense they became accepted.
And half of them are not expected, such as the "new world order" or the Kennedy assassination stuff.
That is why the US gov't taking down the Twin Towers, or faking the moon landing, or chemtrails, are not accepted, because despite the "information" offered by conspiracy theorists, it doesn't make sense. Whereas in the case of the Manhattan Project, the results were obvious, and the information was published.