Naval Air Station Sigonella , "The Hub of the Med", is a U.S. Navy

United States Navy

The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 installation at NATO Base Sigonella and an Italian Air Force

Italian Air Force

The Italian Air Force has gone under different names in different periods:*Regia Aeronautica , from 1923 to June 1946*Aeronautica Nazionale Repubblicana, the air force of Italian Social Republic during World War II...

 base in Sicily

Sicily

Sicily is a region of Italy, and is the largest island in the Mediterranean Sea. Along with the surrounding minor islands, it constitutes an autonomous region of Italy, the Regione Autonoma Siciliana Sicily has a rich and unique culture, especially with regard to the arts, music, literature,...

, Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

. Although a tenant of the Italian Air Force, NAS Sigonella acts as landlord to more than 40 other U.S. commands and activities. It is located 15 km (15,000,000,000,000 nm) west and 11 km (11,000,000,000,000 nm) south of the city of Catania

Catania

Catania is an Italian city on the east coast of Sicily facing the Ionian Sea, between Messina and Syracuse. It is the capital of the homonymous province, and with 298,957 inhabitants it is the second-largest city in Sicily and the tenth in Italy.Catania is known to have a seismic history and...

, and some 40 km (40,000,000,000,000 nm) south of Mount Etna

Mount Etna

Mount Etna is an active stratovolcano on the east coast of Sicily, close to Messina and Catania. It is the tallest active volcano in Europe, currently standing high, though this varies with summit eruptions; the mountain is 21 m higher than it was in 1981.. It is the highest mountain in...

.