Twitter's Dick Costolo Takes on Iran's Hassan Rouhani

Twitter CEO Dick Costolo took on Iran's President Hassan Rouhani the way he knows how to best:

In 140 characters or less.

Rouhani has been a prolific tweeter since he arrived in New York for an annual United Nations General Assembly. However, the website remains banned in his home country.

As of this afternoon, Rouhani had yet to respond to Costolo's tweet.