Mr. Bush said he was taking the action in response to Hamas 's claim of responsibility for the bus bombing in Israel on Tuesday that killed 20 people .
Bush said in a statement that he ordered the U.S. Treasury Department to act following Tuesday 's suicide bombing attack in Jerusalem , which killed 20 people .
responsible for creating, maintaining and ending network connection, transfers data packet from node to node (e.g. router to router) within the network.