*The AG-3 Defense System is a series of satellites powered by "heavy Naquadah" that can detect approaching Goa'uld vessels thousands of light-years away and pierce their ships' shields. In Daniel Jackson's dream, he used the acquired Goa'uld knowledge from the Harsesis to have the U.S. military construct and launch 288 of these satellites into orbit around Earth. He then took control of the satellite system and used them not on the Goa'uld, but on Earth and destroyed Moscow. *Source: Back of card