The USA PATRIOT Act of October 2001 dramatically reduces restrictions on law enforcement agencies' ability to search telephone, e-mail communications, medical, financial, and other records; eases restrictions on foreign intelligence gathering within the United States; expands the Secretary of the Treasury's authority to regulate financial transactions, particularly those involving foreign individuals and entities; and broadens the discretion of law enforcement and immigration authorities in detaining and deporting immigrants suspected of terrorism-related acts. When was the Patriot Act passed