On Tuesday, London Mayor Boris Johnson enjoyed the sun's rays as he sat with former Olympic Medal winners Tessa Sanderson, Dame Kelly Holmes, and Jayne Torvill at the Athletes Village in east London.
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Coal's share of the power mix had fallen to 7%, while wind climbed to new highs to provide 15% of the country's electricity.
State Department spokeswoman Heather Nauert said Pence "was ready to take this opportunity."
Opposition activists said government forces have brought in more reinforcements in recent days.