What was the U. S. President's immediate response to the 9/11 attack

The Bush administration’s responses to the terrorist attacks of September 11, 2001, expanded presidential power in matters of national security. Bush transformed from being a President with questionable legitimacy, who had been selected in a controversial election, to taking on immense presidential emergency powers, defining the threat, and attacking the enemy. His administration justified its actions by citing Article II of the U.S. Constitution that outlines the powers of the President as commander in chief as well as legal authorizations passed by Congress. Following 9/11, Bush’s leadership became a rallying point for the nation. The American people were inclined to trust him because they believed in his ability to maintain their safety. In the weeks after the attack, Bush’s approval rating rose to 90 percent—the highest recorded job-approval rating in U.S. presidential history.