June 10, 2024 3:07 pm What is medetomidine? Medetomidine, an animal sedative, is being mixed into street drugs like fentanyl, leading to a spike in deadly overdoses. US & World Videos 2:17 Good Samaritan rescues man from submerged truck in New Orleans on live TV 1:11 Polaris Dawn crew performs first all-civilian, commercial spacewalk 6:21 Jayson Tatum talks manifesting his NBA and Olympic dreams and releasing a children's book 5:13 2024 MTV VMAs red carpet: Taylor Swift, Sabrina Carpenter, Chappell Roan & more 1:15 What is fracking?