They mean exploits stolen and distributed by a hostile foreign intelligence service. They weren't used before a FIS made them public.https://twitter.com/daveaitel/status/888046303892168704 …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Hmm.. if they mean it that way there's even less evidence to support it... but it is a very poorly phrased sentence at any rate. :)
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.