We are not only facing economic disaster and the question of peace and war. Ukrainians are traumatized by this Moscow-led aggression that has cost the lives of 5,000 people.

It is positive that the United States and the European Union show a great deal of unity. Putin did not expect that. He thought he could split the EU, but the opposite happened: The EU imposed sanctions and even scaled them up. Of course we need more financial and military aid, the supply of lethal weapons is of crucial importance to us.

Putin's survival depends on land grabs of foreign territories. He needs new annexations. The annexation of Crimea has gained him much applause at home. But that will not last forever. The Western sanctions are beginning to take hold and the people are suffering. In order to maintain his popularity, Putin has to commit further international crimes. Otherwise he will be dead politically.

The Russians will always find a pretext for their aggression. It was Putin who said in 2005 that the biggest geopolitical disaster of the last century was the collapse of the Soviet Union. Putin wants to bring Ukraine back into the Russian sphere of influence. That is why he tried everything in order to stop the EU-Ukraine Association Agreement.

If 85 percent of Russians support the annexation of Crimea and the aggression against Ukraine, that is a very bad sign. The post-Soviet legacy is a heavy burden: Most Russians want to have the empire back. The only way it is possible to make that happen is to seize foreign territories.

I'm always very cautious about "brotherhood" concept. Frankly speaking, I don't need such relatives who grab my land and kill my people.

We are not only facing economic disaster and the question of peace and war. Ukrainians are traumatized by this Moscow-led aggression that has cost the lives of 5,000 people.