A man accused of pledging allegiance to Islamic State group and plotting to attack one of superstar singer Taylor Swift’s concerts in Vienna nearly two years ago pleaded guilty as his trial began on Tuesday, Austrian media reported. The plot was thwarted, but Austrian authorities still cancelled Swift’s three performances in August 2024. The singer’s fans, known as Swifties, who had flown to Austria from across the globe to attend a performance of her record-setting Eras Tour were devastated,...