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The AGM-158 Extreme Range missile. Photo: Courtesy of Lockheed Martin

Lockheed Martin plans to flight test an in-development, extreme-range cruise missile with the U.S. Air Force by the end of the year.

The big picture: Lockheed first teased the AGM-158 XR in late 2024. The world's largest defense contractor by revenue now says it's part of a bigger push into customizability.