The FBI is one of the most well respected and powerful law enforcement agencies in the world. The focus of the FBI is stopping terrorism, organized crime, cybercrime and civil rights violations, as well as kidnapping, thefts or murders. It should go without saying that being an FBI agent is a pretty stressful job and one that is extremely dangerous as well. As a matter of fact, we can think of only one job that is more stressful and dangerous than being an FBI agent, and that is being an undercover FBI Agent.
When you're acting as an undercover agent, your job is to infiltrate organizations you're investigating, and also to fool criminals into thinking you're one of them. For example, if an FBI agent is undercover and working to investigate organized crime, his job would be to convince the criminals that he actually was one of them, and would spend all his time, 24/7 pretending that he was part of the Mob.
Do you think you have the ability to be an undercover agent for the FBI? It takes guts, smarts, and the ability to think on your feet. Oh, and you have to be able to lie like crazy too.