For example, while the U.S. introduced stealth aircraft three decades ago, China now has two of these in development and flying. While the U.S. has been operating aircraft carriers for nearly a century, China commissioned its first one this year and is operating jet aircraft from it. Nearly all the mechanical and electronic equipment on this carrier is Chinese made and often of Chinese design. China is a major supplier of satellite launch services and has already developed and tested a KillSat (a satellite that can find and destroy, via collision, another satellite). China has sent men into space in the last decade and is developing a reusable vehicle similar to the American Space Shuttle. China has been producing more and more UAVs with capabilities (and often designs) similar to the most advanced ones in the West. China is still having problems developing state-of-the-art warships but keeps at it and continues to make progress. Same trend with missiles (guided, ballistic, and so on).