The organization tasked with protecting the president has evolved greatly since the 1963 assassination of President John F. Kennedy.
The Secret Service was created in 1865, but since President Kennedy's 1963 assassination, it's evolved into a huge, high-tech operation. (Associated Press)
Today, the president's limo is equipped with armor plates that can stop an IED, 5-inch multilayer windows, a night vision system, fresh oxygen and a mobile blood bank stocked with the president's blood type. (Associated Press)
President Coolidge and President Truman were both known for their walks around Washington, D.C., with limited security. These strolls are a thing of the past. (Associated Press)
Before Kennedy's assassination, presidents and their families did not have Secret Service protection after leaving the White House. Today, presidents are afforded lifetime protection. (Associated Press)
Presidential politics will always include shaking hands and kissing babies, but a request for the Secret Service to back off -- like the one made by Pres. Kennedy on the day of his death -- will no longer be granted. (Associated Press)
In 1963, the Secret Service had an average of 513 agents, including about 350 special agents, and there were fewer than 200 White House police officers. Now, there are more than 6,000 security personnel, including about 3,200 special agents. (Getty)