Lawmakers struck starkly different tones in their initial remarks after emerging from a classified Thursday briefing by the U.S. Navy Admiral who reportedly ordered a follow-up air strike targeting the survivors of an attack against an alleged drug boat in the Caribbean.

Senate Armed Services Committee Ranking Member Jack Reed, a Democrat of Rhode Island, said in a statement to TIME that he was “deeply disturbed” by what he saw at the briefing. “The Department of Defense has no choice but to release the complete, unedited footage of the September 2nd strike, as the President has agreed to do,” he added. “This must and will be the only beginning of our investigation into this incident.”

“What I saw in that room was one of the most troubling things I’ve seen in my time in public service,

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