404. That’s an error.

The requested URL /_/+1/confirm?hl=en&url=http://earthobservatory.nasa.gov/IOTD/view.php%3Fid=1242%26src=share&title=Lake+Chad+as+seen+from+Apollo-7+in+1968+:+Image+of+the+Day was not found on this server. That’s all we know.