In Montevideo, Uruguay, Nixon made an impromptu visit to a college campus, where he fielded questions from students on U.S. foreign policy. The trip was uneventful until the Nixon party reached Lima, Peru, where he was met with student demonstrations. Nixon went to the historical campus of National University of San Marcos, the oldest university in the Americas, got out of his car to confront the students, and stayed until forced back into the car by a volley of thrown objects. At his hotel, Nixon faced another mob, and one demonstrator spat on him.[98] In Caracas, Venezuela, Nixon and his wife were spat on by anti-American demonstrators and their limousine was attacked by a pipe-wielding mob.[99] According to Ambrose, Nixon's courageous conduct "caused even some of his bitterest enemies to give him some grudging respect".[100] Reporting to the cabinet after the trip, Nixon claimed there was "absolute proof that [the protestors] were directed and controlled by a central Communist conspiracy."Secretary of State John Foster Dulles concurred in this view, as did his brother Director of Central Intelligence Allen Dulles in his own rebuke.