David Cameron has told a press conference that the "clear message" from Nato is that President Putin's actions over Ukraine are "indefensible and wrong".
There has been a clear message sent out from this conference to Russia - that what President Putin is doing is indefensible and wrong.
We stand firmly behind Ukraine's right to make its own decisions. Not to have them dictated by Russian tanks rolling over the border.
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.