Ed Miliband is hoping his "brush-by" visit with Barack Obama will show he is ready to lead Britain on the global stage.
Ahead of his visit to the White House, the Labour leader says he is determined to create a "post-Iraq" relationship with the United States.
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Calls have been made for the line to remain permanently in public ownership.
Migrants described being rounded up hundreds at a time, crammed into trucks for hours then dropped in the desert and pointed towards Niger.
Unbroken sunshine will raise temperatures even higher than at the weekend for most parts of the UK.