"There are four or five groups of people that can bring violence to bear at any time," he said.

"Any who bring violence in here will find it visited upon themselves."

But the crop has also brought violence and other social ills.

The 1849 California gold rush miners brought more violence and disease.

But in its first few days, at least, the new policy seems only to have brought more violence.

They're not a culture, they are paid to bring violence to the people the government wants dead.

People also worry that the white farmers will bring violence with them.

Shores' campaign in 1963 to integrate the Birmingham public schools brought violence to him and other residents.

This could bring street protests and violence across the developing world.

Any who bring violence into this chamber will find it visited upon themselves.