our correspondent in kyiv hugo bachega explained why this trip is so important for the ukrainian leader. it is very significant because this is the first foreign trip by president zelensky since the beginning of the war. the us is ukraine s most important ally in terms of the financial and military support that washington has been giving. an important day and a very busy day for president zelensky in washington. he will be meeting president biden at the white house. president biden will announce a package with military assistance, and i think the key thing is that the us will be announcing that it is sending patriot missiles to the ukrainians. this is a sophisticated defence system. the ukrainians say they need it to protect the country from those russian air strikes. for weeks, we have been talking about those missiles, those drones that russia has been using to target this country s essential infrastructure, leaving millions of people