That's Greta Thunberg, the 16-year-old environmental activist from Sweden who admonished the U.N. yesterday: "I shouldn't be up here. I should be back at school on the other side of the ocean. Yet you all come to us young people for hope. How dare you! You have stolen my dreams and my childhood with your empty words."
Reportedly, every other world leader stopped to say hi to her as she took her position near where the leaders walk by. Every leader but President Trump!