Modern ICBMs use GNSS. Do they? The US hasn't deployed a new generation of ICBMs since the GPS constellation became operational. I would also expect that plans

Modern ICBMs use GNSS. Do they? The US hasn't deployed a new generation of ICBMs since the GPS constellation became operational. I would also expect that plans for nuclear war wouldn't rely on vulnerable satellites remaining operational. I thought that US weapons used GPS guidance as a low-cost alternative to other guidance methods in forgiving environments that don't have electronic warfare countermeasures (e.g. fighting the Taliban or armed forces equipped with old gear).