The National Guard has reported for duty in Ferguson, Missouri.

Governor Jay Nixon had them deployed after days of sometimes violent protest over the fatal shooting of an unarmed black teenager by a white police officer.

After meeting with U.S. Attorney General Eric Holder, Obama called for peace in Ferguson.

(SOUNDBITE) (English) U.S. PRESIDENT BARACK OBAMA SAYING:

"While I understand the passions and the anger that arise over the death of Michael Brown, giving into that anger by looting, or carrying guns, and even attacking the police, only serves to raise tensions and stir chaos. It undermines rather than advancing justice."

In Ferguson, forensic pathologists -- hired by the Brown family -- told reporters that 18-year-old Michael Brown was shot at least six times.

Federal and local officials have yet to release their own autopsy report.

And police and eyewitnesses have so far given conflicting accounts of the shooting.

But a lawyer for