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Original poster: According to Valery Uvarov, a russian scientist that have been involved with government UFO secret program, the Tunguska incident was caused by an alien ancient defense device settled in some underground facility to north of impact area. Uvarov had claiming that this device was built by the Anunnaki to prevent meteors and hostile activity. Whatever it is, still activated but the russian scientist doesn´t reveal its location. I found something to north of Tunguska on coordenates 68°06'23.54''N, 132°53'21.73''E that definitely seems to be an artificial entrance to something into the mountains and something else aside that doesn´t look like something made by russians. I´m sure that these images are disclosing some serious stuff.