Extraordinary renditions are when some people take someone from one place to another secretly without telling anyone. They might do this because they think the person they are taking might be dangerous or have done something wrong, but they don't want anyone to know they are being taken away. This is usually done by the government or some people who work for the government. Some people might think this is not very fair because it might not be the right thing to do or they might be taking someone who is innocent.