During the telephone conversation on Saturday, Mr Cameron expressed his sadness at the environmental damage from the oil leak that began on 20 April.
No date or place was announced for the summit, which was agreed during a telephone conversation between the two men late on Saturday.
This would enable the phone to detect when the person on the other end of the telephone was paying full attention to the conversation, and whether the speaker needed to modify what was being said to hold their attention.
It said the offer came during a telephone conversation on Friday between Foreign Minister Lov Rolfe(ph) and Palestinian President Mahmoud Abbas.
This helped smooth a telephone conversation between the two men on December 15th, steering it away from the touchy subject of Canada's apparent exclusion from the list of 63 allies allowed to bid on primary reconstruction contracts.
The Kremlin said on Saturday that President Vladimir Putin had agreed with President Obama during a telephone conversation to increase co-operation in the wake of the Boston attacks.
BBC: Boston marathon bombs suspect Dzhokhar Tsarnaev captured
In his telephone conversation with Mr Karzai, the Iranian president pledged support for Afghan stability, calling on rich nations to assist in the country's reconstruction.
Ms. Lewinsky had a follow-up telephone conversation with Mr. Jordan around Thanksgiving in which he told her he was working on the job search and asked her to call him in the first week of December.
CNN: Transcript: White House Counsel Ruff's opening statement
Mr Howard, who is in Washington for talks on Iraq with US President George W Bush, said South Africa's President Thabo Mbeki told him in a telephone conversation on Saturday that South Africa and Nigeria did not want to hold another meeting of the panel.
So what Mr Diamond recalls about this telephone conversation may turn out to be the most explosive and important part of his testimony to MPs on the Treasury Select Committee, which will take place on Wednesday.
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