In reply to MG:
There is lots of video footage of police harrassing Black people in the States, demanding ID and asking them to explain what they're doing, where they've been and where they are going. Sometimes they are in their own front yard. If they refuse to do as they are told they finish up in handcuffs, face down on the ground etc... You would have thought our police would be a bit more aware of what's going on in the world right now.
I expect the police to be no nonsense and worthy of respect, but we'll never be the land of the free while black people are treated like this.