JD Vance is addressing American soldiers at a British military base.
The US vice president is speaking to service personnel and their families at RAF Fairford in Gloucestershire.
Mr Vance is currently visiting Britain with his family.
David Lammy, the Foreign Secretary, could be fined more than £2,000 after fishing with the vice-president without a licence
The Vance family holiday has seen the vice-president meet several political figures, including Mr Lammy, and there are plans for him to meet Robert Jenrick, the former Tory leadership contender, and Nigel Farage, the leader of Reform.