Houston is the largest city in the state of Texas. It is the fourth-largest city in the United States. As of 2019, more than 2 million people lived there. Sylvester Turner became the mayor of Houston in 2015. Houston is named after Samuel Houston, who fought for Texas to leave Mexico in 1836. The Johnson Space Center of NASA is in Houston.
Houston has the largest medical center and complex in the world, the Texas Medical Center.
George Bush Intercontinental Airport is the main international airport serving Houston, and William P. Hobby Airport is the other international airport that is close to downtown Houston.