Trump on May 20 said he had picked a design for the Golden Dome system and named a leader of the ambitious $175 billion program.

Here’s how some other nations have already responded to the “Golden Dome.”

Known as the Golden Dome, President Trump has declared that it will be operational before the end of his term in 2028. MDA's presolicitation notice posted Wednesday describes a 10-year, $151 billion multiple-award contract formally named Scalable Homeland Enterprise Layered Defense, or SHIELD.