It happened in the mid to late 1990’s. A small group of teens were exploring the area by Chaco Canyon in Northern New Mexico and they stumbled across a massive cave complex with over 20 chambers loader with artifacts, paintings, and a wide variety of things that have absolutely stunned those who have come in contact with. Some say that it is a Portal to another place in the Universe and or a Time Capsule. Apparently, almost immediately, the Suppression Engine attempted to quiet any information about it. Here is a series of audio TTS files of information on this place.
There is now a great deal of information about the Wingmakers, including Amazon.com