A secret bunker hidden deep within the deserts of New Mexico is reported to be the "alien space cathedral" of the Church of Scientology, according to the author of a new book on Scientology. The site is marked by a large symbol etched onto the desert floor: two diamonds surrounded by a pair of overlapping circles, according to the British newspaper The Sun. A private airstrip, built to serve the controversial church's leaders, is within walking distance of the symbol. The entire complex is located near Mesa Huerfanita, N.M., roughly two-hour's drive from Santa Fe, N.M., and three hours north...