completely sealed off. the visit began at the presidential palace where president biden was greeted by president zelenskyy and the first lady ol layne nah zelenska. during that meeting he announced another $500 million package of aid for ukraine including artillery ammunition, anti-armor systems and well as air surveillance radars. he also had this message. take a listen. one year later, kyiv stands and ukraine stands, democracy stands. america stands with you, and the world stands with you. reporter: from the presidential palace, they then made their way to st. michael s cathedral behind me, both presidents walking side-by-side with air raid alarms ringing in the distance.