CHICAGO (AP) - Rapper Juice WRLD, who launched his career on SoundCloud before becoming a streaming juggernaut and rose to the top of the charts with the Sting-sampled hit “Lucid Dreams,” died early Sunday after a “medical emergency” at Chicago’s Midway International Airport. The rapper, whose legal name was Jarad A. Higgins, was 21. Authorities have not released details about his cause of death. He was pronounced dead at a hospital around 3:15 a.m. and taken to the Cook County medical examiner’s office several hours later, according to office spokeswoman Natalia Derevyanny, who said an autopsy would take place Monday....