Laredo is the county seat of Webb County, Texas, United States, located on the north bank of the Rio Grande (Río Bravo) in South Texas, across from Nuevo Laredo, Tamaulipas, Mexico. According to the 2007 census estimate, the city population was 233,152. Laredo is part of the Laredo-Nuevo Laredo Metropolitan Area with an estimate population of 718,073. Laredo's economy is based on international trade with Mexico. It is the largest inland port in the United States. Most major transportation companies have a facility in Laredo. Laredo's location along the southern end of I-35 close to the manufacturers in North Mexico promotes its vital role in trade between the United States and Mexico. Laredo has the distinction of flying seven flags. Founded in 1755, Laredo grew from a villa to the capital of the brief Republic of the Rio Grande to the largest inland port on the United States-Mexican Border. Today, it has four international bridges and one railway bridge. Laredo's weather is semi-arid during the summer and mild during the winter. Laredo International Airport is within the Laredo city limits, while the Quetzalcoatl International Airport is nearby in Nuevo Laredo in Mexico. The city has three professional sports teams: the Bucks, Broncos, and Heat. Texas A&M International University and Laredo Community College call Laredo home. The biggest festival, Washington's Birthday Celebration is held during February all month long, attracting hundreds of thousands of tourists. The Jalapeño Festival, Stockmen's Ball, Princess Pocahontas Pageant, Mr. South Texas Luncheon, an air show, and two major parades are all held in conjunction with the Washington birthday events.