Three Army reservists were killed and at least 40 other troops were injured in the drone attack.
The service members were deployed in support of ongoing security operations at the southern border.
By Tara Copp, AP
The Marine Corps created the team in response to the rising use of unmanned aerial vehicles in international conflicts.
The confirmation came after recovery teams pulled the soldiers' M88 Hercules armored vehicle from a swamp Sunday night.
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