Embassy building is big bucks in ME

rdanPentagon's list shows 865 military bases worldwide, plus bases in Iraq and Afghanistan. There is current funding to build a giant stronghold in Islamabad, Pakistan on the order of the 'embassy' in Iraq to the tune of 785 million USD (corrected number..rdan) (cost overuns barred but guanteed so perhaps about 1 billion USD). The US spends about 102 billion/year USD on maintaining bases throughout the world.Could an important person explain to me the rational for this kind of military base/embassy? How does it achieve whatever goals it is intended for?
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