The joint U.S., French and U.K. missile barrage on Syria this week included the battlefield debut of a stealthy new Lockheed Martin air-launched cruise missile produced as part of a $4.6 billion defense program.

Nineteen missiles fired outside Syrian airspace by two B-1B bombers targeted the Barzah Research and Development Center located in the greater Damascus area. Those Joint Air to Surface Standoff Missiles, or JASSMs, joined 57 Raytheon Tomahawks that Pentagon officials also said targeted the site.

Produced at a Lockheed plant in Troy, Alabama, the JASSM has a low radar cross-section that makes it difficult to detect and is designed to penetrate as far as 200 miles into an adversary’s territory. The extended version fired late Friday night U.S. time can fly more than 500 miles.

Tracking a pre-planned route using GPS and an internal navigation system, the missile is designed to strike with a 1,000-pound penetrating warhead.

While Pentagon officials didn’t specifically single out the JASSMs performance, the “before” and “after” photos of the chemical-weapons facility provided by the Pentagon suggested they were effective.