being killed by a u.s. helicopter in 2007. she was convicted and sentenced to 35 years for the leak but president barack obama commuted her sentence in 2017. the same year manning was convicted whistle blower edward snowden began leaking classified government material to the media in a documentary film maker. >> the more you're ignored, the more you're told it's not a problem until eventually you realize these things need to be determined by the public. >> reporter: snowden a cia employee and nsa contractor shared documents for the national security agency about far-reaching surveillance programs. >> peoples lives are at risk because of data that. >> reporter: among other things, snowden was charged with giving defense information to someone without a security clearance and revealing classified information. he's living in exile in russia.