Iran's President Hassan Rouhani has said that sanctions against Tehran are "violent, pure and simple," in an address to the UN general assembly.
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Temperatures will reach around 28 Celsius (82F) at their highest.
A minute's silence will be observed at 11am on Thursday in remembrance of those who lost their lives in the Manchester Arena attack.
New research has found those who consumed two cups had a 35% reduced risk, and for those who drank five cups, the risk halved.