
Attack on Richard Nixon's motorcade
Attack on the motorcade of US Vice President Richard Nixon in Caracas, Venezuela while he was visiting in 1958
On May 13, 1958, US vice president Richard Nixon's motorcade was attacked by a mob in Caracas, Venezuela, during Nixon's goodwill tour of South America. The event was described at the time as the "most violent attack ever perpetrated on a high American official while on foreign soil." Close to being killed while a couple of his aides were injured in the melee, Nixon ended up unharmed and his entourage managed to reach the US Embassy.
Wikipedia
https://www.upi.com/Archives/1958/05/14/US-fighting-men-sent-to-Nixons-protection-in-Venezuela/6951526143409/
U.S. fighting men sent to Nixon's protection in Venezuela
By United Press International
CARACAS, Venezuela -- More than 1,000 U.S. paratroops and Marines converged on the Caribbean today ready if needed to rescue Vice President Richard M. Nixon from any assassination attempts in mob-ridden Venezuela.
Nixon and his wife Pat were scheduled to leave the sanctuary of the U.S. embassy after midnight tonight to fly home.
Mobs swarmed through the streets during the night, smashing windows and shrieking anti-American slogans. Police armed with jungle knives as well as clubs and pistols strove to restore order.
The Nixons, who narrowly escaped death or injury at the hands of the mobs Tuesday, spent the night at the U.S. embassy in Caracas under the protection of a heavy cordon of police.
Troops Ordered to Area
President Eisenhower ordered troops into the Caribbean area and instructed Secretary of State John Foster Dulles to tell the Venezuelans to take "every possible measure" to safeguard the Vice President's life.
Venezuelan authorities blamed the mob outbreak on "tramps and miscreants linked with the regime of (ousted ex-President Marcos) Perez Jimenez."
Rear Adm. Wolfgang Larrazabal, chief of the military junta which replaced Perez in January, said "several" such persons have been arrested.