Protestors throw ‘potentially lethal’ rocks
03:31NBC News' Tom Costello displays a piece of concrete that Baltimore protesters threw at his reporting team and speaks with Reverend Ron Owens, a minister who attended Freddie Gray's service.
NBC News' Tom Costello displays a piece of concrete that Baltimore protesters threw at his reporting team and speaks with Reverend Ron Owens, a minister who attended Freddie Gray's service.