Anonymous taking down websites in retaliation for Megaupload; MPAA, Justice dept, RIAA, & Universal websites all down
"http://www.justice.gov & universalmusic.com TANGO DOWN! You should have EXPECT US!" - AnonOps
"Anonymous's favorite weapon for these attacks is what's called for a "distributed denial of service" (DDoS) attack, which directs a flood of traffic to a website and temporarily crashes it by overwhelming its servers. It doesn't actually involve any hacking or security breaches.
The Anonymous attack came soon after the DOJ announced the indictment of seven individuals connected to Megaupload for allegedly operating an "international organized criminal enterprise responsible for massive worldwide online piracy of copyrighted works."" [CNN]
"Hacktivist" collective Anonymous are retaliating for the closing of Megaupload, claiming responsibility for taking down the websites of the RIAA (Recording Industry Association of America), the US Justice department, Universal Music Group (and a French affiliate) and MPAA (Motion Picture Association of America). All of those sites are currently unreachable, and there are current threats against Senator Chris Dodd's website, Whitehouse.gov, FBI.gov, Vivendi France, and many others.