The Turkish government himself must find a solution to the problem concerning the Workers' Party of Kurdistan (PKK) and prove that the Workers' Party of Kurdistan is a terror organization, which threatens the security of the country, head of NATO's Defense Planning and Operations Division George Katsirdakis stated to the PanARMENIAN.Net journalist. He said, only in this case cross-border operations by the Turkish army into Northern Iraq may be justified. The representative of the Alliance underlined that in the issue of struggling against international terrorism all NATO member-states have a common stance. "It is an evil, which must be punished, and the sooner, the better," he underscored.