The National Security Space Launch (NSSL) Phase 3 Lane 1 Industry Day is an event where the United States Space Force (USSF) Space Systems Command will provide details and timelines for the Lane 1 IDIQ on-ramp and upcoming Launch Service Task Orders (LSTOs). The event will include a general session, a classified briefing, and one-on-one sessions with companies that submit a request. The NSSL program aims to deliver national security space capability to the warfighter at affordable prices. The program has implemented a tiered mission assurance approach that accepts a higher risk to mission success to address mission-specific needs. • The Industry Day event will be held on 19-20 August 2025 at the Los Angeles Air Force Base in El Segundo, CA. • In-person attendance is required for this event. • The event will include a general session, a classified briefing, and one-on-one sessions with companies that submit a request. • The NSSL program has implemented a tiered mission assurance approach that accepts a higher risk to mission success to address mission-specific needs. • Lane 1 provides awardees who can meet a subset of the NSSL requirements the opportunity to compete for ~20 missions via annual task order competitions.