Secret Service: 91 breaches of presidential security since 1980

The summary paints a disturbing picture of how difficult it is to stop determined intruders — often mentally ill — even as it notes that violent or commando-style raids have not occurred, and that terrorists or organized adversaries are unlikely to risk a head-on attack.

Then-Director Brian Stafford commissioned the review in 2001 after the service was humiliated for a third time by the most notorious presidential gate-crasher, Richard C. Weaver, who evaded inauguration security to shake George W. Bush’s hand. Weaver, a California minister, had previously infiltrated a 1991 prayer breakfast attended by then-President George H.W. Bush, and Clinton’s 1997 inaugural luncheon. He approached the younger Bush again at a prayer breakfast in 2003 before being arrested.

“I believe God makes me invisible to the security, undetectable,” Weaver told reporters. The Secret Service concluded that Weaver succeeded by manipulating others to obtain tickets, telling guards he was lost or looking for a restroom, and generally “appearing as [if] you are supposed to be there,” as the Salahis apparently did.