US National Security Advisor Jake Sullivan does not have a clear answer as to whether Washington will allow the use of US weapons for deeper strikes against Russia. He noted that this question was asked of US President Joe Biden at a press conference after the NATO summit. Then he said that the United States is constantly looking at the situation – what Ukraine needs, what can be offered, and according to this, America makes its judgments. And as the war in Ukraine changes, the US support changes, the opportunities that are provided evolve, and the parameters that are set change. “I can’t give…