As regulators propose restrictions on their use or manufacturing, Pentagon officials have told Congress that eliminating the chemicals would undermine military readiness.
"Over the past 20 years, the U.S. military has struggled with escalation of force and many civilians were killed when they were falsely viewed as a threat. This incident appears to be one of many such cases," said one expert.
"Free advice for the speaker of the House: if you want to cut spending so bad, start and end with the Pentagon budget," said one watchdog group.
The leaked documents "revealed U.S. assessments of the war in Ukraine as well as sensitive secrets about American allies."