On a recent Monday, Secretary of State Hillary Rodham Clinton walked with her husband onto a stage at the New York Sheraton to cheers and whoops and a standing ovation that only got louder as she tried to quiet things down.

It was a friendly crowd — the annual meeting of her husband's foundation, the Clinton Global Initiative — and people may have been eager to hear her speech about using U.S. aid to target investment barriers such as old land tenure laws. But really, they were there to see her.

"She's just looked so sad and so tired," said Ritu Sharma, a women's rights activist, referring to Clinton's appearances in the days after the attack in Benghazi, Libya, that killed four Americans, including U.S. Ambassador Chris Stevens.