It is suggested that a portable "power megaphone" be brought to São Paulo for emergency use should Communists sabotage the public address system provided for President Kennedy,
Braddock, Daniel M.,
"President's Visit to São Paulo--Portable 'Power Megaphone' Desirable"
(1962).
Opening the Archives: Documenting U.S.-Brazil Relations, 1960s-80s.
Brown Digital Repository. Brown University Library.
https://repository.library.brown.edu/studio/item/bdr:671498/
Opening the Archives is a joint effort by Brown University and the Universidade Estadual de Maringá, Paraná, Brazil to digitize and index 100,000 U.S. State Department documents on Brazil from 1963-73 and make them available to the public on a …