A large burning cross—a historic symbol of hate and intimidation against Black Americans—was discovered in a Chicago park where former President Obama famously delivered his acceptance speech when he was elected the nation's first Black president. Tuesday afternoon's act sent shock waves through a city where more than one in four people are Black. Some people drove or walked by, staring, and a video of the cross-burning gained traction online, the AP reports. The video, taken by a motorist, shows the wooden cross engulfed in bright orange flames as it leans against a tree in Grant Park, located in the core of the city's downtown and near Lake Michigan.