Seems that a lot of high profile sites have been "visited" recently by the Deceptive Duo and each time a calling card is left. They have defaced numerous military web sites, online banks and other gov't sites. Here's a list of the sites they've attacked so far.
Their mission is to "locate and scan critical cyber-components of The United States of America for vulnerabilities creating a foreign threat, while remaining undetected. Once located, publicly inform those who deserve to know the extent of incompetence that lies between foreign lines and the United States Administration."