Book excerpt: A memorandum from the President of the United States on December 9, 2020 explains this document: MEMORANDUM FOR THE VICE PRESIDENTTHE SECRETARY OF STATETHE SECRETARY OF DEFENSETHE ATTORNEY GENERALTHE SECRETARY OF THE INTERIORTHE SECRETARY OF COMMERCETHE SECRETARY OF TRANSPORTATIONTHE SECRETARY OF ENERGYTHE SECRETARY OF HOMELAND SECURITYTHE DIRECTOR OF THE OFFICE OF MANAGEMENT AND BUDGETTHE DIRECTOR OF NATIONAL INTELLIGENCETHE ASSISTANT TO THE PRESIDENT FOR NATIONAL SECURITY AFFAIRSTHE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATIONTHE DIRECTOR OF THE OFFICE OF SCIENCE AND TECHNOLOGY POLICYTHE CHAIRMAN OF THE JOINT CHIEFS OF STAFFSUBJECT: The National Space PolicySection 1. References. This directive supersedes Presidential Policy Directive - 4 (June 29, 2010) and references, promotes, and reemphasizes the following policy directives and memoranda: a) Presidential Policy Directive 26 - National Space Transportation Policy (November 21, 2013)b) Executive Order 13803 - Reviving the National Space Council (June 30, 2017)c) Space Policy Directive 1 - Reinvigorating America's Human Space Exploration Program (December 11, 2017)d) The National Space Strategy (March 23, 2018)e) Space Policy Directive 2 - Streamlining Regulations on Commercial Use of Space (May 24, 2018)f) Space Policy Directive 3 - National Space Traffic Management Policy (June 18, 2018)g) Space Policy Directive 4 - Establishment of the United States Space Force (February 19, 2019)h) National Security Presidential Memorandum 20 - Launch of Spacecraft Containing Space Nuclear Systems (August 20, 2019)i) Executive Order 13906 - Amending Executive Order 13803 - Reviving the National Space Council (February 13, 2020)j) Executive Order 13905 - Strengthening National Resilience Through Responsible Use of Positioning, Navigation, and Timing Services (February 12, 2020)k) Executive Order 13914 - Encouraging International Support for the Recovery and Use of Space Resources (April 6, 2020)l) Space Policy Directive 5 - Cybersecurity Principles for Space Systems (September 4, 2020)It is, in other words, a vitally important planning documen