The hacker group LulzSec pulled off another high profile hack when it claimed credit for taking down the CIA's website for a couple of hours this Wednesday. The group posted a tweet at their page saying: "Tango down- cia.gov- for the lulz." The site was back up by 8 pm according to the Washington Post.

This is the latest in a series of hacks the group has pulled off. It has claimed credit for hacking the PBS websites, Sony, the US Senate and the Atlanta chapter of InfraGard- a group partnership between the FBI and the private sector aimed at sharing information and intelligence to prevent hostile acts against the United States.

The latest attack on the CIA website only underscores the mounting concern over cyber attacks. It was only a few weeks ago that the Gmail accounts of government officials were hacked. LulzSec's agenda seems to be mainly to embarrass companies and the government over their lax internet security.

According to Richard Steinnon, author of "Surviving Cyberwar" and a cyber expert, LulzSec has a somewhat "anarchistic" agenda. "They're against government control of information, much as they're against media control of music and movies."

The attack on the CIA website was done by overloading the site's server with requests for access. The agency is "looking into these reports" according to CIA spokeswoman Marie Harf.

LulzSec used the same method to gain access to Sony's site and take 1 million user names and passwords. After getting the information LulzSec would publish the information for entertainment purposes. It also published the 180 user names, passwords and e-mail addresses of member of InfraGard. When the group hacked the Senate site it promptly published the user names and passwords of the system administrators.

The group seems to be on the hunt for another target. LulzSec asked its 158,000 followers on Twitter for suggestions on what sites to hack next.