4chan and 8chan are best known for their focus on extremism and white supremacy, but also served as a platform for the alt-right in 2016 before being shut down and sued out of existence. Andre Agassi’s return Andre Agassi is back in the Grand Slam finals. The American tennis star and 17-time Grand Slam champion is the favorite to win the Australian Open this weekend. The Associated Press contributed to this report.