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Updated February 3, 2022

Defense Primer: National Security Space Launch

_ntroduc_on
The National Security Space Launch (NSSL) is a U.S.
government program that acquires launch services, aimed at
ensuring continued access to space for critical national
security missions. The U.S. Air Force oversaw NSSL's
predecessor program, the Evolved Expendable Launch
Vehicle (EELV), and awarded four companies contracts to
design a cost-effective launch vehicle system. The
Department of Defense (DOD) acquisition strategy was to
select one company to ensure national security space (NSS)
launches were affordable and reliable. The EELV effort
was prompted by significant increases in launch costs,
procurement concerns, and the lack of competition among
U.S. companies. Today, the NSSL program's main priority
is mission success. A RAND study released April 2020
identified a magnitude of risk associated with assured
access to space. As Congress continues its oversight of
NSSL, it may consider examining DOD's plan on the
prioritization of the launch-related risks to ensure continued
access to space and 100% mission success.
A major concern in Congress and elsewhere over U.S.
reliance on a Russian rocket engine (RD-180), used on one
of the primary national security rockets for critical national
security space launches, was exacerbated by the Russian
backlash over the 2014 U.S. sanctions against its actions in
Ukraine. Congress enacted laws limiting the number of
Russian RD-180 rocket engines authorized to be used to a
total of 18 rocket engines, beginning with the National
Defense Authorization Act for Fiscal Year 2017 and ending
on December 31, 2022. Moreover, significant overall NSSL
program cost increases and unresolved questions over
individual launch costs, along with legal challenges to the
Air Force contract awards by space launch companies,
prompted legislative action. In the John S. McCain NDAA
for Fiscal Year 2019, Congress renamed the EELV to the
NSSL program to reflect a wider mission that would
consider both reusable and expendable launch vehicles.
The Space and Missile Systems Center (SMC), together
with the National Reconnaissance Office (NRO), released a
request for proposals in May 2019 to award two domestic
launch service contracts. On August 7, 2020, the U.S. Space
Force competitively awarded two Firm-Fixed-Price,
Indefinite Deliver Requirement contracts to United Launch
Alliance (ULA) and Space Exploration Technologies
Corporations (SpaceX) for Phase 2 of the NSSL program.
These two companies share the responsibility for launching
U.S. military and intelligence satellites through 2027. ULA
was awarded approximately 60% of the launch services
orders, similarly SpaceX 40%. NSS launch has been a
leading legislative priority in the defense bills over the past
few years, and with the increasing number of commercial

launch providers and more competition, it will likely
continue to be a legislative priority.
Background
The origins of the NSSL program date back to 1995, after
years of concerns within the Air Force and space launch
community over increasing cost and decreasing confidence
in the continued reliability of national access to space. The
purpose of EELV was to provide the United States
affordable, reliable, and assured access to space with two
families of space launch vehicles. Initially only two
companies competed: Boeing produced the Delta IV launch
vehicle, and Lockheed Martin developed the Atlas V.
Overall, the program provided critical space lift capability
to support DOD and intelligence community satellites,
together known as NSS missions.
The EELV program evolved modestly in response to
changing circumstances, and the Air Force approved an
EELV acquisition strategy in November 2011, revising it in
2013. That strategy was designed to (1) sustain two major
independent rocket-powered launch vehicle families to
reduce the chance of launch interruptions and to ensure
reliable access to space; (2) license and stockpile the
Russian-made RD-180 heavy-lift rocket engine, a critical
component of the Atlas V; (3) pursue a block-buy
commitment to a number of launches through the end of the
decade to reduce launch costs; and (4) increase competition
to reduce overall launch costs. The Air Force and others
viewed the overall EELV acquisition strategy as having
successfully reduced launch costs while demonstrating
highly reliable access to space for DOD and the intelligence
community.
NSSL Program Today
The U.S. Space Force, the sixth branch of the Armed
Forces, is responsible for the military space launch mission.
The NSSL program is managed by the Space Systems
Command, located at Los Angeles Air Force Base. The
NSSL program currently consists of four launch vehicles:
Atlas V and Delta IV Heavy (both provided by ULA of
Denver, CO) and Falcon 9 and Falcon Heavy (both
provided by SpaceX of Hawthorne, CA).
NSS launches support the Space Force, Navy, and NRO.
More specifically, the Atlas V has launched commercial,
civil, and NSS satellites into orbit, including commercial
and military communications satellites, lunar and other
planetary orbiters and probes, earth observation and
military research satellites, weather satellites, missile
warning and NRO reconnaissance satellites, a tracking and
data relay satellite, and the X-37B space plane (a military
orbital test vehicle). The Delta IV has launched commercial

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