Shot and chaserpic.twitter.com/A98Ejh2Abc
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
It is not and was not "anti-terror" tool, just a mass surveillance tool, like the "Patriot" Act. Calling it that just furthers propaganda.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.