By the time he left the stage, it had become one of the deadliest concerts in US history. Eight people died and dozens more were injured. Fans were filmed chanting "stop the show" and pleading for staff to help. One even climbed onto a camera platform to point out the injured.
In an open letter published by The Washington Post, Hatice Cengiz urged the Canadian megastar to cancel his Dec. 5 performance in the Red Sea city of Jiddah to "send a powerful message to the world that your name and talent will not be used to restore the reputation of a regime that kills its…