After today's PMQs, David Cameron raced off to his meeting with President Obama. It was the second meeting between the men - the first was when Mr Obama was still a candidate last summer.
The meeting didn't need to happen. There certainly wasn't a meeting with Nick Clegg. President Obama has a massive schedule that included his first meetings with the Russian and Chinese leaders. That it happened at all is a sign of the White House's expectation that Gordon Brown (who Obama lavished praise on earlier in the day) is unlikely to be in office for long.
On the American side were Hillary Clinton, Tim Geithner, National Security Advisor Jim Jones and the Acting US Ambassador to London. On our side were David Cameron, William Hague, George Osborne, Pauline Neville-Jones, Ed Llewellyn and Andy Coulson.
The meeting that ran for slightly longer than thirty minutes focused on the G20, Afghanistan, Pakistan, Iran, green technologies and NATO reform. CCHQ described the meeting as "positive" and "business-like". Mr Cameron told the BBC that he had found the President "deeply impressive".
Samantha Cameron and Michelle Obama also met together at the same time. Mrs Cameron gave Mrs Obama a designer bracelet and gave the Obama children a copy of the Railway Children and Stories from Shakespeare. America's First Lady gave Mrs Cameron a book on the Wizard of Oz and also a book of fairy tales.
Mr Cameron has also met the Australian PM over the last few days and the Mexican President. He is also due to hold talks with Canadian PM Stephen Harper.