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ABC News reports on the situation in war-torn Yemen and interviews an ̽»¨¾«Ñ¡ aid worker on the ground. Watch parts 1 and 2 of its coverage of the crisis and the ̽»¨¾«Ñ¡'s work on Nightline.

Afghanistan is facing a humanitarian crisis, and Afghans who assisted the United States government are among the groups in particular danger.

"Nightline" reports from war-torn Yemen, where three years of conflict have left nearly three million people homeless and 22 million in need of humanitarian aid. The story shows ̽»¨¾«Ñ¡ teams reaching remote villages to provide lifesaving aid. Watch part 2 of the report.  

The world’s worst humanitarian crisis has wreaked havoc on women, men and children in Yemen. From famine to collapsed health systems, the crisis in Yemen has been hidden for too long. Since 2015, the Saudi- and Emirati-led coalition has undertaken 18,000 airstrikes—1 every 99 minutes.

Conflict and drought have brought millions of people in East Africa to the brink of starvation in what is shaping up to be the most severe humanitarian crisis of our time.