Four Ukrainian children with cancer and their families arrived Tuesday at St. Jude Children’s Research Hospital in Memphis, marking the first hospital in the U.S. to receive patients from Ukraine, officials announced. According to St. Jude, the families travelled aboard a U.S. government medical transport aircraft from Krakow, Poland. Some of the children held white unicorn stuffed animals and Ukrainian flags as they walked into the hospital, according to video provided by St. Jude.