Can the ‘Silver Fox’ outwit Vladimir Putin?

By Tara McKelveyBBC News, WashingtonImage source, WHITE HOUSE POOL Wendy Sherman, one of the world’s most powerful diplomats, is known as the Silver Fox because of her silver-white mane and her canny deal-making style. On Wednesday, she is helping to lead the US-Russia talks in Europe.Ms Sherman – the US Deputy Secretary of State, one…