Attention at all passengers. You can now book your train tickets on Uber and get 10% back in Uber credits to spend on your next train journey.

So no excuses not to visit your in-laws this Christmas.

Trains now on Uber. Tees and sees apply check the Uber app.

America has witnessed some astonishing acts of moral courage and of cowardice since George Floyd died on a street corner in South Minneapolis on Memorial Day. But few have been more consequential than

Darnella Phrasia's instinct to do what all 17-year-olds do. Pull out her phone and post a video.

Darnella filmed the final minutes of George Floyd's life

as Officer Derek Chauvin pinned him to the street outside Cup foods.

If it wasn't for me, four cops would have still had their jobs, she later wrote on Facebook.

Each year, around a thousand Americans are killed by police.

For young African American men, police are among the leading causes of death.

With 150 days to go, this is checks and balance.

I'm John Prido, the Economist's US editor, and this is a podcast about the 2020 elections.

Each week we take one big theme shaping American politics and explore it in

depth. Today, how will police violence against black Americans end.

It's not the first time a video of white police mistreating a black American has triggered

protests and rioting in American cities.

But away from the cameras, serious attempts to improve policing have been made across the

U.S. In this episode we'll look at how

effective those have been, look at the history of race and law and order in electoral

politics and figure out who the politics of police versus protest might

favour in 2020. With me as ever to discuss all of this, John Fasman, the economists Washington

correspondent and Charlotte Howard the New York Bureau Chief. Charlotte how has

...