Thank you! It was so long ago when I saw this episode. I suppose they meant Baikonur, Russian rocket site in Kazakhstan.
There are so many mistakes about Russia in X-Files, especially when Moulder arrived to Moscow and one day later he was in Siberia. And he made all this journey on the truck! I remember, when I watched this scene with my friends, we laughed out loud. And we adored the terrible accent of Krychek when he spoke Russian:)