CREATE TABLE table_6858 ("Date" TEXT, "Rocket" TEXT, "Type" TEXT, "Launch site" TEXT, "Satellite" TEXT)

What was the launch site for a satellite of GPS IIIA-2?
SELECT "Launch site" FROM table_6858 WHERE "Satellite" = 'gps iiia-2'
SELECT "Launch site" FROM "table_6858" WHERE "Satellite" = 'gps iiia-2'