Before and after satellite photos of Japan by the NYT

Besides the devastation they show, these photos are a neat HTML 5 application. The are back-to-back photos of areas of Japan damaged by the tsunami. The two pictures have a draggable divider down the middle. Pull it left, you see the image as it was April 4, 2010. Pull it right, you see the image as it was March 12, 2011.