The Grass Valley Center for the Arts has canceled Kathy Griffin's scheduled June 16 appearance at the Grass Valley Veteran's Memorial Building, said Julie Baker, the center's executive director. Baker announced the cancellation Wednesday, just one day after Griffin released a controversial photo of herself holding a mock version of President Trump's head, which was covered in fake blood and appeared decapitated. The photo was taken by Tyler Shields, a provocative Los Angeles-based celebrity photographer and contemporary artist. Griffin released a public apology Tuesday afternoon on Twitter. "I beg for your forgiveness," said Griffin in her 30-second apology video. "I...