I will have to find the videos, but there are several documentary and a few amateur videos of these guys in action in Afghanistan. They are apparently considered equal to the lower end of Special Forces quality fighters. A few crews here and there are considered world class specops personnel.

A big part of it came up out of the lack of trust and confidence in leaving the dark side of foreign policy enforcement up to the CIA. I understand the DEA crews operate more or less openly but are otherwise paramilitary in nature.