The U.S. Air Force (USAF) today stands at a crossroads over its launch acquisition strategy. In this report, authors analyze the heavy lift launch market to help the USAF gain clearer insight into the number of U.S. launch service providers that the global heavy lift launch market can support and the impact of near-term decisions on the USAF's ability to (1) meet NSS launch demand using U.S. providers and (2) sustain two or more U.S. providers.