US Air Force/Staff Sgt. Robert M. Trujillo Since entering service 60 years ago, the U-2 has snooped all over the world, and over the decades the plane has changed a great deal. Work that Lockheed Martin is doing on the spy plane now is meant to keep it flying for decades to come, providing real-time information to other troops and advancing other new technology by serving as a test platform. Visit Business Insider’s homepage for more stories. The Air Force’s U-2 has been keeping an eye on the planet’s hot spots for 60 years, and with a $50 million contract