The blue-gray light of the distant dawn filters down the canyons of building to the city streets outside the window. I've been awake for hours already, listening to the city. The grinding staccato of diesel engines, the pop and sharp hiss of hydraulic arms raised and lowered, the clatter of metal doors rolling up, the clanging rattle of chains banging against them, shops entered, and the rattle and clang again as the doors close behind the shop keepers. Later comes the soft hiss of brooms on the sidewalk, the splash of water thrown out a bucket, and the louder hiss of the broom in the soapy water, the jangle of handcart wheels rolling over uneven stone of sidewalks. Last comes the rush of cars, the muted voices of workers emptying trash, and the blue gray light turning to the white of day. This is no longer the largest city on earth. Last time I was here it was, but that, as my wife regularly reminds me, was a long time ago. Now Chongqing China is three times as large as this. Still, Mexico City is a hell of a city. Larger than any other on this continent. And there is something about here that is more alive than anywhere else on the continent. It is big, loud, overwhelming, incomprehensible. Wonderful in its way. We arrived yesterday afternoon, made it through customs and caught a cab to our rental apartment. The first thing we did was head out for tacos. Just kidding. The first food we went for was Indian. Corrinne and I have a kind of tradition of eating in immigrant restaurants. Our first meal in Nicaragua was at a Palestinian restaurant. Our favorite meal in Paris was at an Iraqi restaurant. For Mexico City we went Indian. Then we walked down to the zócalo and watched the sun fade away and the blue twilight descend. It was a great end cap to a long day of travel, which was surprisingly smooth all things considered. Our kids are pretty great at entertaining themselves anywhere, using almost nothing, so airports and airplanes were, relatively speaking, pretty much non-stop entertainment. Just the notion that *we're floating above the planet* was enough to keep them enthralled for a three hour flight.