In addition to escalating its military support for UNITA, the Reagan administration and its conservative allies also worked to expand recognition of Savimbi as a key U.S. ally in an important Cold War struggle. In January 1986, Reagan invited Savimbi to a meeting at the White House. Following the meeting, Reagan spoke of UNITA as winning a victory that "electrifies the world". Two months later, Reagan announced the delivery of Stinger surface-to-air missiles as part of the $25 million in aid UNITA received from the U.S. government. Jeremias Chitunda, UNITA's representative to the U.S., became the Vice President of UNITA in August 1986 at the sixth party congress. Fidel Castro made Crocker's proposal—the withdrawal of foreign troops from Angola and Namibia—a prerequisite to Cuban withdrawal from Angola on 10 September.