The US Secret Service played a significant role on September 11, 2001, with agents working to prevent attacks on US leadership. Following the attacks, agents took action to protect the nation's leaders. Their efforts were part of a nationwide response to the events of that day.

Further details about the Secret Service's actions are available, highlighting the seen and unseen heroism of agents during this time. The events of September 11, 2001, led to a widespread response from the Secret Service, with agents across the nation working to prevent further attacks. More information can be found through the original source, providing a deeper look into the Secret Service's role on September 11, 2001.