China is building a sprawling network of missile silos, satellite imagery appears to show

China is building a sprawling network of what appear to be intercontinental ballistic missile silos in its western desert that analysts say could change the equation for US military planners in Asia.

The likely missile field, comprising 120 silos that could potentially house weapons capable of reaching the United States mainland, was documented by researchers at the James Martin Center for Nonproliferation Studies using satellite imagery supplied by commercial satellite company Planet Labs Inc. The researchers compared satellite photos taken during the past four months with images captured within the past week, finding the missile site covering a grid of hundreds of square kilometers in China's Gansu province, said researcher Jeffrey Lewis, a Chinese nuclear weapons expert who examined the images with colleague Decker Eveleth, the first person to spot the silos.