In the next few months there will be new GPS chips on the market that can simultaneously use BOTH the US and Russian GPS networks, so even if the US shut off their network, a device with these chips would still be very accurate, especially since the Russian network is more accurate than the US one (later design that learned from US mistakes). It is my understanding that the new chips are designed to replace the older US-only chips fairly easily. I love the way competition gets us the best possible technology quickly and cheaply. As I noted elsewhere, Israel can NOT maintain a weapons edge any longer, time for serious talking.
UN says bombing of Aleppo among 'the worst' of Syrian war (AP)
from the article: Gates says Washington to sell smart bombs to Saudi Arabia