Probably not at all unbiased from WSWS:

...April Oliver, who produced the CNN investigative report "Valley of Death" which aired last June. Oliver and her co-producer Jack Smith were fired by CNN when they refused to disavow their exposé of US use of sarin nerve gas in a secret special forces raid into Laos in 1970 (Operation Tailwind). Peter Arnett, who narrated the TV report, caved in to pressure from CNN executives and repudiated the story. He was publicly reprimanded by CNN at the time, and has now been fired.

Actual text of Arnett and Oliver's as seen in the London Observer in 1998.

From looking through google, Rick, it seems one can find verification of whatever one wants to believe about the sarin thing. I do't see anything which seems unbiased about "Operation Tailwind."