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                                                                                      Updated December  11, 2018

Defense Primer: Command and Control of Nuclear Forces


The U.S. President has sole authority to authorize the use of
U.S. nuclear weapons. This authority is inherent in his
constitutional role as Commander in Chief. The President
can seek counsel from his military advisors; those advisors
are then required to transmit and implement the orders
authorizing nuclear use. But, as General John Hyten, the
Commander   of U.S. Strategic Command (STRATCOM),
noted during his September 2016 confirmation hearing, his
job is to give advice, while the authority to order a launch
lies with the president.

The President does not need the concurrence of either his
military advisors or the U.S. Congress to order the launch
of nuclear weapons. In addition, neither the military nor
Congress can overrule these orders. As former
STRATCOM Commander General Robert Kehler has
noted, members of the military are bound by the Uniform
Code  of Military Justice to follow orders provided they are
legal and have come from competent authority. But
questions about the legality of the order-whether it is
consistent with the requirements, under the laws of armed
conflict (LOAC), for necessity, proportionality, and
distinction-are more likely to lead to consultations and
changes in the President's order than to a refusal by the
military to execute the order. The President could delegate
the authority to authorize the use of nuclear weapons to
others in the chain-of-command (an option considered
necessary during the Cold War), but they also could not
overrule the President.

The   Nuclear Command and Control
System (NCCS)
According to the Nuclear Matters Handbook, published by
the Office of the Deputy Assistant Secretary of Defense for
Nuclear Matters, the elements of the nuclear command and
control system (NCCS) support the President, through his
military commanders, in exercising presidential authority
over U.S. nuclear weapons operations. The system relies
on a collection of activities, processes, and procedures
performed by appropriate military commanders and support
personnel that, through the chain of command, allow for
senior-level decisions on nuclear weapons employment.
Specifically, the NCCS provides the President with the
means  to authorize the use of nuclear weapons in a crisis
and to prevent unauthorized or accidental use.

The NCCS   collects information on threats to the United
States, communicates that information through the chain of
command   to the President, advises the President on options
for a response, communicates the President's chosen
response to the forces in the field, and controls the targeting
and application of those forces. The process begins with the
radars, satellites, and processing systems that provide
unambiguous, reliable, accurate, timely, survivable, and


enduring warning about attacks on the United States, its
allies, and its forces overseas.

In a scenario where the system identifies an attack or an
anomalous event, the President would participate in an
emergency communications  conference with the Secretary
of Defense, the Chairman of the Joint Chiefs of Staff, and
other military advisors. They would offer the President
details and an assessment of the possible incoming attack,
while the STRATCOM Commander would explain the
President's options for a retaliatory attack.

The President would then evaluate and respond to the
information provided in the conference, then decide
whether to authorize the use of U.S. nuclear weapons. He
would communicate  his choices and provide this
authorization through a communications device known as
the nuclear football-a suitcase carried by a military aid
who  is always near the President. The suitcase is equipped
with communication tools and a book with prepared war
plans for certain targets. The President could choose from
these prepared plans or, time permitting, ask STRATCOM
to prepare an alternative.

If the President did choose to respond with a nuclear attack,
he would identify himself to military officials at the
Pentagon with codes unique to him. These codes are
recorded on an ID card, known as the biscuit, that the
President carries at all times. He would then transmit the
launch order to the Pentagon and STRATCOM.  The
Secretary of Defense would possibly contribute the process
by confirming that the order came from the President, but
this role could also be filled by an officer in the National
Military Command  Center at the Pentagon. STRATCOM
would implement the order by preparing to launch the
weapons needed for the selected option. According to
Bruce Blair, an expert on U.S. command and control, once
the order is transmitted to the war room, they would
execute it in a minute or so. If an immediate response was
selected, the (land-based) Minuteman missiles will fire in
two minutes. The submarines will fire in 15 minutes. Blair
also notes that there is no way to reverse the order.

Options for Nuclear Use
As General Michael Hayden, the former director of the CIA
noted, the system is designed for speed and decisiveness.
It's not designed to debate the decision. Long-range
missiles attacking the United States from Russian territory
could reach U.S. territory in around 30 minutes; sea-based
systems deployed closer to U.S shores might arrive in half
that time. If the United States wanted to retaliate before
U.S. weapons, or, more importantly, the U.S. command and
control system, were degraded by an attack, then the entire
process of identifying, assessing, communicating, deciding,
and launching would have to take place in less than that


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