Turkey, Ankara / corr Trend A.Alasgarov / Daniel Fried, the US Deputy Secretary State on European and Eurasian countries, said that cooperation with Turkey against the Worker Party of Kurdistan (PKK) has reached a new stage. "I am glad that our cooperation against terrorist organization PKK has reached a new stage and yields concrete results. Turkey is our friend. Together we have suffered many crises. Our friendship is passed from state to state, from government to government, and is also developed in the private context," he said.