Black Hawk replacement 'existential' for Sikorsky's future, executive says
More than 4,000 helicopters are in service based on the Black Hawk design, which the Pentagon wants to improve on for the next generation of helicopters. |!| New Haven
More than 4,000 helicopters are in service based on the Black Hawk design, which the Pentagon wants to improve on for the next generation of helicopters. |!| New Haven