S. Army Corps of Engineers Norfolk District publication date: 3 December 2009 described at URL: https://www.flickr.com/photos/armyengineersnorfolk/4156060762/
https://www.flickr.com/people/29327036@N03 publication date: 3 December 2009 described at URL: https://www.flickr.com/photos/armyengineersnorfolk/4156077056/
https://www.flickr.com/people/29327036@N03 publication date: 3 December 2009 described at URL: https://www.flickr.com/photos/armyengineersnorfolk/4156075382/
https://www.flickr.com/people/29327036@N03 publication date: 3 December 2009 described at URL: https://www.flickr.com/photos/armyengineersnorfolk/4155292919/
https://www.flickr.com/people/29327036@N03 publication date: 3 December 2009 described at URL: https://www.flickr.com/photos/armyengineersnorfolk/4155301181/