Lockheed Martin has delivered 72 F-35 fighter jets, but upgrades are facing delays. The company is working to improve the jets’ software and hardware systems. The F-35 program has faced challenges over the years, but Lockheed Martin remains committed to enhancing the capabilities of these advanced aircraft.

Read more at Investing.com: Lockheed Martin delivers 72 F-35 jets facing upgrade delays, Bloomberg News reports