Not everyone is made for working at an intelligence agency. This includes dogs.
Recently, the CIA announced that it has 'fired' a trainee bomb sniffer dog named Lulu because she just wasn't interested in the job. While some dogs get past the disinterest, others are not meant for the life of a secret agent. To read more on Lulu and what happened to her after she was fired (can they let her out once she's seen the insides of the top intelligence agency?), check-out this Mashable article.