The DHS wants the key to sign the DNS root zone

http://www.dailykos.com/story/2007/3/31/1828/16663
http://www.heise.de/english/newsticker/news/87655

"The key will play an important role in the new DNSSec security extension, because it will make spoofing IP-addresses impossible. By forcing the IANA [Internet Assigned Numbers Authority] to hand out a copy of the master key, the US government will be the only institution that is able to spoof IP addresses and be able to break into computers connected to the Internet without much effort."

I'm a little confused as to what exactly this implies. Does this mean that if the Department of Homeland Security actually gets its grubby little hands on this "master key" they will have the ability to hack into any website they feel dissents from their policies and essentially wipe the site off the face of the internet?