Recently, certain transportation giants tried to censor some information about vulnerabilities in their card systems.  Specifically, the took legal action against some MIT students who were planning to give a talk Defcon about their findings.

Fortunately, we live in the age of the Internet, where censorship is a near impossibility.  In the interest of the continued free flow of information, here is the PowerPoint presentation for the talk in question, which, as of writing, is still available as a direct download here:
 
http://www-tech.mit.edu/V128/N30/subway/Defcon_Presentation.pdf

Mac users, if for some reason you can't read PowerPoints, hit up openoffice.org for some free (and open-source) software to do the trick.

Fuck censorship.  And people who don't pull apart their Oreo cookies (sickos).