sentences:  The United States would offer military protection for Saudi Arabia's oil fields, and in return the Saudi's would price their oil sales exclusively in United States dollars (in other words, the Saudis were to refuse all other currencies, except the U.S. dollar, as payment for their oil exports).On September 11, 2001, terrorist attacks on New York City and Washington, D.C. and in a field near Shanksville, Pennsylvania by four hijacked airplanes killed 2,977 victims and cost an estimated $150 billion in property and infrastructure damage and economic impact, exceeding the death toll and damage caused by the Japanese attack on Pearl Harbor 60 years earlier.15 of the 19 hijackers in the attacks came from Saudi Arabia, as did the leader of the hijackers' organization, (Osama bin Laden).