People are always asking me to choose my favorite picture of the President. But I just can't do it. So let me tell you about my favorite day. It was a Saturday in February 2010. Washington was under siege with snow. I slept in my office overnight, knowing I probably couldn't drive to the White House the next day. And then I guessed...and yes, hoped...that the President of the United States would be a dad and play with his girls in the snow. And he did. Two more pictures will follow.