The U.S. Secret Service (USSS) is a law enforcement agency of the U.S. federal government, which is affiliated to the U.S. Department of Homeland Security. The agent swears that employees are divided into agents and employees in uniform. Before March 2003 1, the Secret Service was attached to the US Treasury Department. The main jurisdiction of the Secret Service is to prevent and investigate the counterfeiting of US dollars and bonds, protect the President, Vice President, President-elect and Vice President-elect, former President and their spouses (except those whose spouses remarry), presidential candidates and vice presidential candidates determined within 120 days before the general election, children and grandchildren of current and former presidents under 16 years old, visiting foreign heads of state and government and their spouses, and the President shall. At the same time, it is also responsible for tracking and investigating all kinds of financial fraud suspects and providing assistance for the investigation of some local criminal cases. United states secret service's uniform department is responsible for protecting the US Embassy, the US Naval Observatory and the White House in Washington, D.C. ... There are still some secret missions that are still kept secret. Usually, agents wear very conservative suits, but they can range from evening dresses to casual jeans.