Edward Joseph Snowden is a computer specialist who worked for CIA and NSA,which is nation’s most secretive agencies. However Snowden disgarded his highly paied salary and made revelation. PRISM, for example, is a work promoted by government which may be the method of preventing terror attack since it is worked by monitoring citizens’ network. However my revelling this secret Snowden claimed that it trasspasses citizen’s privacy. I personally believe Edward is a kind of hero type man since he abandoned this job to let the whole world to know what the government is trying to do.