I don't know the whole story but i know this that America and Russia are two great powers. Their actions have dire consequences on the Earth. We could be headed to World War III if the cold war between them doesn't stop. Trump and Putin needs to sit down and act like responsible citizens.
The World cannot afford another World War. If a world war errupts, it will be the end of humanity as many countries have atomic weapons. The leaders should not let their personal differences create diplomatic tensions. They need to sit down and make policies for the betterment of people.