Player Embed Code: Download Embed Share Top Air Force Officer Speaks at 35th Space Symposium Defense.gov April 9, 2019 | 22:25 Air Force Chief of Staff Gen. David L. Goldfein provides remarks during the 35th Space Symposium in Colorado Springs, Colo., April 9, 2019. Space Symposium brings representatives from the space community to one place to provide insight, to discuss and focus attention on space-related issues, and to promote dialogue.