The United States has deployed weapons in space and will use them to defend American forces, Air Force Secretary Troy Meink said Monday – the first public acknowledgment of such capabilities in orbit and a deliberate signal to those that pose potential threats in the domain.

“China develops and operates space and counterspace capabilities as part of a military modernization strategy,” the US Space Force says on its website, while “Russia views space as a warfighting domain and believes space supremacy will be a decisive factor in future conflicts.”

US military officials have repeatedly warned the two countries are testing new offensive space capabilities, citing examples such as Russian satellite constellation training missions that Washington says could demonstrate “attack and defend tactics” for future combat and China’s development of a nuclear capable partial-orbit hypersonic missile.