The summer session of the OSCE Parliamentary Assembly will be held in Washington for the first time. The participants of the event will discuss the report on Nagorno Karabakh drawn up by Goran Lennmarker. Deputy Chairman of the National Assembly of Armenia Vahan Hovhannisyan will leave for Washington to take part in the session. In the Vice-Speaker's opinion, the Lennmarker report is balanced, reported the Yerkir newspaper.