Emirates is an airline based in Dubai, United Arab Emirates. The airline is a subsidiary of The Emirates Group, which is wholly owned by the government of Dubai's Investment Corporation of Dubai. It is the largest airline in the Middle East, operating nearly 3,400 flights per week from its hub at Dubai International Airport, to more than 133 cities in 74 countries across six continents. Cargo activities are undertaken by the Emirates Group's Emirates SkyCargo division. The airline ranks among the top 10 carriers worldwide in terms of passenger kilometres, and has become the largest airline in the Middle East in terms of revenue, fleet size, and passengers carried as of 2007. In 2012 the airline was the fourth-largest airline in the world in terms of international passengers carried and scheduled passenger-kilometres flown. The airline was the third-largest in terms of scheduled freight tonne-kilometres flown. The company also operates four of the world's longest non-stop commercial flights from Dubai to Los Angeles, San Francisco, Dallas/Fort Worth, and Houston.