We do know that once again innocent people were killed in part because someone who wanted to inflict harm had no trouble getting their hands on a gun. - Barack Obama

The American people will say a prayer for Boston tonight. And Michelle and I send our deepest thoughts and prayers to the families of the victims in the wake of this senseless loss...We still do not know who did this or why. And people shouldn’t jump to conclusions before we have all the facts. But make no mistake - we will get to the bottom of this. And we will find out who did this; we'll find out why they did this. Any responsible individuals, any responsible groups will feel the full weight of justice.

And if there is one thing that he and this year’s anniversary should teach us, if there’s one lesson I hope that Malia and Sasha and young people everywhere learn from this day, it’s that with enough effort, and enough empathy, and enough perseverance, and enough courage, people who love their country can change it.

So we can all appreciate our own identities, our bloodlines, our beliefs, our backgrounds -- that tapestry is what makes us who we are. But the history of Africa -- which is both the cradle of human progress and a crucible of conflict -- shows us that when define ourselves narrowly, in opposition to somebody just because they’re of a different tribe, or race, or religion -- and we ignore who is a good person or a bad person, are they working hard or not, are they honest or not, are they peaceful or violent -- when we start making distinctions solely based on status and not what people do, then we're taking the wrong path and we inevitably suffer in the end. This is why Martin Luther King called on people to be judged not by the color of their skin but the content of their character. And in the same way, people should not be judged by their last name, or their religious faith, but by their content of their character and how they behave. Are they good citizens? Are they good people?