Memphis is a major transportation hub. Memphis International Airport houses the corporate headquarters of overnight shipping company FedEx. The city is also an important interstate freeway crossroads and has a busy river port and many railroad connections. It is linked to West Memphis, Arkansas, by two bridges across the Mississippi River. Memphis is the commercial center of the Mississippi Delta, a rich farming area known for its cotton and soybean production. Memphis is noted for its cotton market, as well as its general distribution and manufacturing facilities. Products include processed foods, electronic equipment, medical implants and supplies, pharmaceuticals, and wood and paper products. A United States naval air station is nearby.