[ame="http://www.youtube.com/watch?v=J8nZ6hqE9mg"]YouTube - Egypt ~ why it blockades Gaza[/ame]
As for U.S. security and military aid to Egypt, which is about $1.3 billion annually, it does not aim to strengthen Egyptian military power against any external threat, as this would be contrary to the declared U.S. objective of ensuring Israeli security and maintaining Israeli military supremacy over its Arab neighbors, including Egypt. Instead, this aid is devoted mainly to strengthening the regimes domestic security and its ability to confront popular movements. This hardly enhances USAIDs popularity among the Egyptian people or educated elites. The unflinching American support for Israel, and Washingtons failure to reach a comprehensive political settlement even on its own conditions of ensuring Israels security within the 1967 borders, make Egyptians and other neighboring Arabs skeptical of political settlements that lead nowhere. It also leads them to question the value of the limited U.S. aid tied to the peace treaty with Israel, which is used to improve Americas image in the media and cover up the U.S. bias toward Israel at the expense of Arab rights.
U.S. Aid to Egypt: The Current Situation and Future Prospects - Carnegie Endowment for International Peace
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Aid is central to Washington's relationship with Cairo. The US has provided Egypt with $1.3 billion a year in military aid since 1979, and an average of $815 million a year in economic assistance. All told, Egypt has received over $50 billion in US largesse since 1975.
The money is seen as bolstering Egypt's stability, support for US policies in the region, US access to the Suez Canal, and peace with Israel.
$50 billion later, taking stock of US aid to Egypt / The Christian Science Monitor - CSMonitor.com