LulzSec Takes Down the CIA Website
The CIA site is again up, as least for now. The Twitter user, @Quadrapodacone, said that a DDoS attack on these sites was easy and not really hacking. He also challenged them to hack fbi.gov or cia.gov.
While LulzSec has indeed taken down cia.gov, as @Quadrapodacone said, anyone can create a botnet and use the LOIC (Low Orbit Ion Cannon) or some similar tool to DDoS a site. The LOIC is so simple, anyone can use it.

The challenge and response came shortly after LulzSec announced a "Dial-a-Hack" hotline.