Activists, politicians, and celebrities were among the thousands of people who paid their respects on Monday to Michael Brown, the unarmed 18-year-old who was shot dead by a police officer in Ferguson, Missouri, NBC News reported. "All of us are required to respond to this," the Rev. Al Sharpton said, bringing the crowd of 4,500 to their feet. "We have to have a movement," he said. The funeral was located at a Baptist church in St. Louis, about six miles from the spot where Brown was killed. Brown's family called for a "day of silence" without the protests that turned the St. Louis suburb into a flashpoint for racial tensions and clashes with law enforcement.