The patriot act comes to mind. (Which, btw, did nothing to stop Nidal Hasan from killing people.)
The Patriot Act was infact a great help it stopping Nidal Hasan from killing more people than he did! Infact, if we allow full wiretapping, remove all that paperwork that gets in the way of stopping police from stopping and searching you, as well as any probable cause requirements involved, this would never have happenned! It just turns out the soft liberal types, who are first to defend cartoon depictions of child pornography, obviously direct support for paedophiles I might add, which prevents us from keeping you safe from terrorists (You do remember 9/11 right?).
Our inability to stop and hold suspects without probable cause gives them time to destroy all evidence of there terrorist or paedophilic activities! This is why it is vital to detain them imediately so that such evidence can be found, and justice served! Won't you please think of the children?
Signed, Your bought Politician.
For those interested they can already do this in the UK, US I'm not so sure.