welcomed in boulgaria. here is more what he had to say about putin's war in ukraine. the u.s. made it clear they don't want to be involved in the process of giving jets to ukraine. do you support other countries doing it or either encouraging other countries to do if there is no u.s. involvement? >> what other countries do is their choice. the united states doesn't stand in the way of providing assistance. we'll focus on the things we know are making a difference. what is making a difference in this fight for the ukrainians is the provision of anti-aircraft systems, the provision of armored systems and also, things