If we are talking about a new format of negotiations on Crimea, then certainly it should involve the United Kingdom and the United States, the guarantors of the Budapest Memorandum. And, of course, the EU and Canada. Russia is excluded because it violated the guarantees. The fact is that the world crisis began with the Russian attack on Ukraine - the occupation of Crimea, and this crisis has equally affected all countries. Therefore, the leading states have to take on responsibility. The United States must be among them.” said Refat Chubarov.