Construction at Iran's nuclear facilities
These overlays are taken from a report by the Institute for Science and International Security (ISIS) published on 14 April 2006.
These overlays, when compared with Google Earth's base images, show construction progress at Iran's nuclear facilities in Isfahan and Natanz.
Read more at Ogle Earth.

Natanz: 25 February 2006

Isfahan overview: 23 March 2006

Isfahan detail: 23 March 2006