Barack Obama: “Michelle and I send our thoughts and prayers to Ed's loved ones and to the city that survives him.”

People need to “rediscover what’s the story we tell about how we’re going to live together, and see each other, and recognise each other, and disagree, and yet, still care for each other”.

I’m going to insist that we can do better than we’re doing right now.

A drift towards extremism was "not inevitable

I think when we act on that basis, it doesn't always work out, but over time things do get better.