The F-35 Lightning II cruises over North Texas at 20,000 feet on Jan. 8. The F-35 was put through a battery of handling and propulsion tests on its second test flight. Photo courtesy of Lockheed Martin The F-35 Lightning II cruises over North Texas at 20,000 feet on Jan. 8. The F-35 was put through a battery of handling and propulsion tests on its second test flight. Photo courtesy of Lockheed Martin SHARE: Download: Full Size (4.56 MB) Credit: VIRIN: 066680-M-XLE62-022.jpg Photo Gallery