Houston is the fourth-largest city in the United States, and the largest city in Texas. The city's population grew quickly with the production of local shipbuilding during World War II and the establishment of NASA's Manned Spacecraft Center in 1961. In 1973, NASA's Manned Spacecraft Center was renamed the Lyndon B. Johnson Space Center, where NASA's Mission Control Center is located.
In addition to the aerospace industry, Houston's economy ranges in industrial services, such as energy, manufacturing, aeronautics, and transportation. Houston is also known for building oilfield equipment and it's popular healthcare sector. The city is home of the Texas Medical Center, the world's largest concentration of healthcare and research institutions. The Astrodome opened in 1965 as the world's first indoor domed sports and is now known as the "Eighth Wonder of the World".
