From an Alternet article by Steven Rosenfeld:

Whistleblowers are not spies or traitors, as the Bush and Obama administration’s lawyers have alleged. They are patriotic and often conservative Americans who work inside the government and with military contractors, and who find unacceptable—and often life-threatening—or illegal behavior goes unheeded when they report it through the traditional chain of command. They worry about doing nothing and feel compelled to go to the press, even if they suspect they may lose their jobs. What they don’t realize is that their lives will never quite be the same again, because they underestimate the years of government persecution that follows.  [T]he whistleblower [is] a special kind of American hero—one whose importance is easily forgotten in today’s infotainment-drenched media. Since the Vietnam War in the 1960s, whistleblowers have been part of many history-changing events: questioning the war in Vietnam by releasing the Pentagon Papers on military’s failings; exposing the Watergate burglary that led to President Richard Nixon's resignation; exposing the illegal nationwide domestic spying program by the George W. Bush administration after 9/11; revealing the military’s failure to replace Humvees in Iraq and Afghanistan with better bomb-deflecting vehicles, leading to hundreds of deaths and maimings . . .