President Biden has arrived in the United Kingdom for his first overseas trip since taking office. After meeting British Prime Minister Boris Johnson today, Biden will take part in the G7 leaders’ meeting in Cornwall and then head to the NATO summit in Brussels. He will end his trip in Geneva, where he will meet Russian President Vladimir Putin.

During his trip, Biden is expected to announce the U.S. will buy 500 million doses of Pfizer’s coronavirus vaccine and donate them to 92 lower-income countries. Under the emerging plan, the first 200 million doses would be distributed by the end of this year, the rest by June of 2022.