Houston is a vibrant international city that heartily enjoys its tradition of being a place of firsts. General Sam Houston, the heroic namesake of the city, was the first president of the Republic of Texas. Houston, the city, was the first word spoken from the surface of the moon and the first to build an air-conditioned sports stadium. Houston is the fourth largest city in the U.S., home to 2 million people, and a hub of international businesses. Its leaders are also focusing their attention on making their city not only a great place to live, but a great place to visit as well.