The lore on the government's knowledge of the alien presence includes a book, holographic in nature here and there among the written pages, which describe the Earth's history and most particularly her history as regards the genetic engineering of Homo Sapiens. Such a book was developed by us, in collaboration with others who had participated over the ages, and presented to your government in order to communicate more fully and quickly. Most humans are barely telepathic, and though the government provided many adequate telepaths, the lack of precision in the slight differences in their interpretations of what was said disturbed the leadership inordinately. The Yellow Book, as it has come to be called, told the same story, complete with video, to everyone who read it. The description that Bob Lazar gave is quite accurate in this regard.