Twitter co-founder tweets Iranian president, asks, 'Are citizens of Iran able to read your tweets?'

http://news.yahoo.com/twitter-co-founder-tweets-iranian-president--asks-him-if-people-of-iran-can-read-his-tweets-152851230.html?.b=index&.cf3=U.S.+News&.cf4=2&.cf5=Yahoo+News&.cf6=%2F