Security Oversight indeed... Realistically.

RT (@RT_com) Tweeted: #Moscow is ready to sell S-400 to #US if Americans feel insecure – Rostec CEO https://t.co/YDEq7sbYzS https://twitter.com/RT_com/status/962559321631535104?ref_src=twcamp%5Eshare%7Ctwsrc%5Em5%7Ctwgr%5Eemail%7Ctwcon%5E7046%7Ctwterm%5E2