The Secretary of defense Ashton Carter and the head of the Ministry of defense of Germany Ursula von der Leyen discussed on the first day of the week in the U.S. capital, "opposition to Russian aggression," said the U.S. Department of defense. "Ministers Carter and von der Leyen stressed the importance of the unity of NATO against Russian aggression and discussed ways of mutual work to support measures NATO to provide guarantees to allies," - said in the report. Also Carter expressed gratitude to Germany for help Kurdish forces fighting against the "Islamic country" in Iraq. Western countries have accused the Russian Federation in the aggression on Ukraine, Moscow is a fundamentally denies. The US, EU and several other countries have introduced against Russia punishment after the annexation of Crimea to Russia, Russia responded by counter measures.