Assertion: sarin nerve gas | /r/ObjectUse | used by u.s. forces
Facets:
value: in a secret operation in laos
type: LOCATION
Source sentences:
text: Each concluded that the allegations that sarin nerve gas was used by U.S. forces in a secret operation in Laos, known as Tailwind, and that U.S. defectors were intentionally killed were not supported by the evidence.