Social media campaign aims at fighting food crisis in Africa's Sahel

Vast portions of west and central Africa have become so dry that they can't support crops, livestock and the millions of people who live there.

The Sahel - a belt of arid land that stretches across Africa below the Sahara Desert - is a zone prone to cycles of drought, and eight countries are seeing the worst of it this time.
The United Nations estimates that more than 10 million people are in danger of starving to death. Aid workers on the ground say it's getting worse quickly.
In response, UNICEF is launching a 24-hour social media campaign on Tuesday to raise awareness about the food crisis in Africa.
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