Blocked!

It seems that the page http://www.whitehouse.gov/infocus/homeland/index.html is blocked by my county's web server.

http://www.whitehouse.gov/infocus/homeland/index.html
is inaccessible through Hertfordshire Grid For Learning
because it contains material which is inappropriate for use in schools.

Interesting. I've tried a few pages related to US Homeland Security and they're mostly blocked.