the country. Gannett is the largest U.S. newspaper publisher as measured by total daily circulation. Most notably, it is the owner of USA Today, which itself is headquartered in Tysons, and which is by far the largest newspaper in the United States by circulation. Tourism Tourism is Washington's second-largest industry, after the federal government. Approximately 18.9 million visitors contributed an estimated $4.8 billion to the local economy in 2012. In 2019, the number of tourists who visited the city increased to 24.6 million, of which 22.8 million were domestic tourists. In total, the tourists spent $8.15 billion during their stay. This heavy tourism helps many of the region's other industries, such as lodging, food and beverage, entertainment, shopping, and transportation. Additionally, tourism helps the city maintain a robust network of world-class museums and cultural centers, most notably the Smithsonian Institution. The city and wider Washington region has a diverse array of attractions for tourists, such as monuments, memorials, museums, sports events, and trails. Within the city, the National Mall serves as the center of the tourism industry. It is there that many of the city's museums and monuments are located. Adjacent to the mall sits the Tidal Basin, where several additional memorials and monuments lie, including the popular Jefferson Memorial. Additionally, Union Station is a very popular tourist spot with its multitude of restaurants and shops. Among the most visited tourist destinations is Arlington National Cemetery in nearby Arlington County, Virginia. This is a military cemetery that serves as a burial ground for former military combatants. It is also the location of President John F. Kennedy's tomb, marked by an eternal flame. President William Howard Taft is also buried in Arlington. The Tomb of the Unknown Soldier is located in the cemetery and is guarded 24/7 by a tomb guard. The changing of the guard is a popular tourist attraction and occurs once every hour from October through March and every half-hour during the rest of the year. Culture Arts Washington, D.C. is a national center for the arts and houses numerous leading concert halls and theaters. The John F. Kennedy Center for the Performing Arts is home to the National Symphony Orchestra, the Washington National Opera, and the Washington Ballet. The Kennedy Center Honors are awarded each year to those in the performing arts who have contributed greatly to the cultural life of the United States. This ceremony is