Government whistle-blowers to Edward Snowden: Don't come home

"Kiriakou, a former CIA agent, is serving 30 months in prison. He emailed a freelance reporter the name of a covert CIA officer, violating the Intelligence Identities Protection Act. The name was never published, but Kiriakou became one of eight people charged by the Department of Justice since 2008 for leaking classified information under the Espionage Act."