The study of geography is about more than just memorizing places on a map. It's about understanding the complexity of our world, appreciating the diversity of cultures that exists across continents. And in the end, it's about using all that knowledge to help bridge divides and bring people together.

We will finish the race.

I believe that for all our imperfections, we are full of decency and goodness, and that the forces that divide us are not as strong as those that unite us.

How does the saying go? When two locusts fight, it is always the crow that feasts.' Is that a Luo expression?' I asked. Sayid's face broke into a bashful smile. We have a similar expression in Luo,' he said, 'but actually I must admit that I read this particular expression in a book by Chinua Achebe. The Nigerian writer. I like his books very much. He speaks the truth about Africa's predicament. the Nigerian, the Kenya - it is the same. We share more than divides us.

Sometimes when these kinds of things happen, it can seem a little bit too much to bear. But what I want the people of Louisiana know is that you're not alone on this. Even after the TV cameras leave, the whole country is going to continue to support you and help you until we get folks back in their homes and lives are rebuilt.

Whether our forebears were strangers who crossed the Atlantic or the Pacific or the Rio Grande, we are here only because this country welcomed them in and taught them that to be an American is about something more than what we look like, or what our last names are, or how we worship.

Change will not come if we wait for some other person or some other time. We are the ones we've been waiting for. We are the change that we seek.