David Cameron is under mounting pressure to join US air strikes against Islamic State in Iraq.
Today he was joined by Barack Obama and other world leaders at the Nato summit in Wales, where, as ITV News Political Editor Tom Bradby reports, the question of how to respond to the militant group is right at the top of the agenda.
Angus Raffle, 8, says his surprise meeting with the President at Stonehenge was "awesome". His mother says she "squealed like a teenager".
The language has been ramped up at this Nato summit, yet caution appears the order of the day after the mistakes of recent history.
The US President's motorcade pulled up at the school with his black stretch limousine bearing a Welsh flag for the first time in history.