The story of Treyvon Martin - the 17-year-old black boy shot dead by Neighbourhood Watch captain George Zimmerman in Florida last month - has come to a frenzied climax in the US.
Zimmerman told police he killed Martin in self-defence, having felt threatened by the black kid in the hoodie.
A 911 call revealed Zimmerman followed the teenager, not the other way round.
A search of the boy's body found, not a gun, but a packet of sweets.
Yet Zimmerman has still not been arrested. Obama (below) had to say something.
He couldn't suggest a bias which might affect a Justice Department investigation. His team felt it important he avoided making the issue race-focused.
He wanted to convey his personal sadness and sense of pain and loss.
How to avoid judgment, yet make it clear how he felt, in one line?
"If I had a son he would look like Treyvon," he told America.