US Attorney General Eric Holder sought to reassure the people of Ferguson about the inquiry into the shooting death of a black 18-year-old by a white police officer.
The attorney general remembered how he was stopped twice on a New Jersey highway and accused of speeding. Police searched his car, going through the boot and looking under the seats.
"I remember how humiliating that was and how angry I was and the impact it had on me," Mr Holder said during a private meeting with about 50 community leaders at St Louis Community College.
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Last minute preparations are going on at the Church of St Mary Magdalene where Princess Charlotte will be christened.
Princess Charlotte is being christened on Sunday at Sandringham in Norfolk in only her second public appearance since she was born.
Thunderstorms clear the North, leaving a dry and warm day with sunny spells.