The Lockheed P-80 Shooting Star, USAF’s first operational jet fighter.

The Lockheed P-80 Shooting Star, USAF’s first operational jet fighter.

The Lockheed XP-58, which was Lockheed's last fighter to use the twin boom layout.

The Lockheed P-38M, a two-seat version of the Lightning equipped with radar for the night fighter role.

The Lockheed XP-49, which was basically the P-38 airframe with a pressurised cockpit and Continental engines.

The Lockheed XP-49, which was basically the P-38 airframe with a pressurised cockpit and Continental engines.