Israel is the largest cumulative recipient of U.S. foreign assistance since World War II. To date,
the United States has provided Israel $124.3 billion (current, or non-inflation-adjusted, dollars) in
bilateral assistance. Almost all U.S. bilateral aid to Israel is in the form of military assistance,
although in the past Israel also received significant economic assistance. Strong congressional
support for Israel has resulted in Israel receiving benefits not available to any other countries; for
example, Israel can use some U.S. military assistance both for research and development in the
United States and for military purchases from Israeli manufacturers. In addition, U.S. assistance
earmarked for Israel is generally delivered in the first 30 days of the fiscal year, while most other
recipients normally receive aid in installments, and Israel (as is also the case with Egypt) is
permitted to use cash flow financing for its U.S. arms purchases. In addition to receiving U.S.
State Department-administered foreign assistance, Israel also receives funds from annual defense
appropriations bills for rocket and missile defense programs
http://www.fas.org/sgp/crs/mideast/RL33222.pdf