 Complete the following phrase:  Work on the military base commenced in 1971, with a large airbase with several long range runways constructed, as well as a harbour suitable for large naval vessels. Although classed as a joint UKUS base, in practice it is primarily staffed by the US military, although the UK maintains a garrison at all times, and Royal Air Force long range patrol aircraft are deployed there. The United States Air Force used the base during the 1991 Gulf War and the 2001 War in Afghanistan, as well as the 2003 