They used white boards in the Iran negotiations and someone wrote on one in permanent marker http://mobile.nytimes.com/2015/04/04/world/middleeast/an-iran-nuclear-deal-built-on-coffee-all-nighters-and-compromise.html?_r=1&referrer= …
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
They used white boards in the Iran negotiations and someone wrote on one in permanent marker http://mobile.nytimes.com/2015/04/04/world/middleeast/an-iran-nuclear-deal-built-on-coffee-all-nighters-and-compromise.html?_r=1&referrer= …