Prince William and Kate Middleton arrived in the U.S. for the first time in eight years Wednesday. But their trip has already been overshadowed by fresh accusations of racist conduct by the royal institution and scenes of NBA fans booing the couple and chanting “USA, USA” as they sat court-side at a Celtics vs Miami Heat game in Boston. William and Kate arrived in the city for a three-day visit ahead of the Earthshot Prize, the prince’s environmental awards ceremony taking place Friday.