Long before being nerdy was cool, there was Leonard Nimoy.

There's one issue that will define the contours of this century more dramatically than any other, and that is the urgent and growing threat of a changing climate.

The fact that there is a robust debate in Congress is good. The fact that the debate sometimes seems unanchored to facts is not so good.

Our kids grew up here [in the White House]. Some of our best friends have been made here in this place. There have been moments that were highlights for us - that - you know, are going to be hard to duplicate.

It's true that I have not been able to completely close Guantanamo, but we've drastically reduced the population from 700 or so to around 60 now.

I believe that marriage is the union between a man and a woman. Now, for me as a Christian - for me - for me as a Christian, it is also a sacred union. God's in the mix.

One of the brightest lights of our time-a brilliant writer, a fierce friend, and a truly phenomenal woman.