The OV-10 Bronco is a unique airplane in military aviation. An Observation/Light Attack aircraft, the Bronco served for decades and was especially effective in Counterinsurgency or COIN operations.

A pair of nearly 50-year-old planes has been brought out of retirement to fight ISIS. The Vietnam-era OV-10 Bronco turbo-propeller planes are part of an experiment to see if “light turbo-prop ...