So-called “less-lethal” weapons like those that have been used against demonstrators in Los Angeles can cause severe, lasting harm like nerve or brain damage or blindness. They can also kill.

Security forces fire tear gas, rubber bullets in downtown Los Angeles as protesters continue to rally for a third day.

Tear gas, rubber bullets and flash grenades have been used by law enforcement in Los Angeles after protesters took to the streets in response to Donald Trump’s deployment of the…