In 1953, President Eisenhower approved CIA Director Allen Dulles' recommendation that General Truscott be appointed the CIA's Deputy Director for Coordination. This appointment meant that Truscott was now controlling the agency's rapidly expanding network of agents worldwide. His responsibilities included facilitating the overthrow of governments in Iran and Guatemala. Truscott was involved in planning Operation PBSuccess, the CIA mission to overthrow Guatemalan President Jacobo Árbenz. According to Harry Jeffers' biography, Truscott was instrumental in convincing Eisenhower to support PBSuccess with air power. However, another biography by William Heefner suggests that specifics of Truscott's involvement cannot be substantiated.