The Atlantic's excellent 'In Focus' photo blog has published the third and final part of its 2012 Year in Photos. The three-part series includes 135 images from around the world, covering a great breadth of events and subjects. As you'd expect of such a review, there are some occasionally graphic images that some readers may find disturbing but there are also some astonishing photos giving a surprising views of other countries and cultures.

We've chosen three of our favorite images from the three-part article, and you can click on them (or the text links) to see Atlantic's full selection. And as always, let us know your favorites in the comments. 

Space shuttle Discovery en route to its final home at the Smithsonian Institution's National Air and Space Museum, Washington, DC on April 17, 2012. (Reuters/Robert Markowitz/NASA)
Still in orbit, here is the International Space Station, 240 miles above earth. This is a composite image, assembled from a series of images taken from a camera mounted on the station. (NASA/Don Pettit)
President Barack Obama hugs his wife Michelle, after she introduces him at a campaign event at the Village of East Davenport in Davenport, Iowa, on August 15, 2012. Following the President's re-election this image became the most-Tweeted photograph ever. (Scout Tufankjian/Obama for America)