SANAA, Aug. 25, 2021 (UNI/Xinhua) -- Yemenis buy grains on a market in Sanaa, Yemen on Aug. 24, 2021. More than half of Yemenis are facing crisis levels of food insecurity, and 5 million people are one step away from famine. As the value of the Yemeni rial continues to plummet, more and more Yemenis are being pushed to the brink.