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          Congressional Research Service
~ Informning the legislative debate since 1914


                                                                                         Updated  November  7, 2023

Armed Drones: Evolution as a Counterterrorism Tool


Armed  drones (also commonly called Unmanned  Aerial
Vehicles, or UAVs) are unmanned  aircraft designed to
identify, surveil, and engage ground-based targets-ranging
from materiel to individuals-with kinetic weapons. The
United States has significantly increased its use of armed
drones to attack global counterterrorism targets since the
terrorist attacks of September 11, 2001 (9/11) continuing to
today to support U.S. and partnering country
counterterrorism missions. Prior to 9/11, the United States
deployed unarmed  drones at various places around the
world primarily to support surveillance activities. Congress
plays a continuing role in approving, funding, and
overseeing the use of UAVs.

Evolution  of Armed   Drone   Usage
With the Curtiss NSC-2, the U.S. military first started using
remote-controlled aircraft in the 1930s-initially for
intelligence, surveillance, and reconnaissance (ISR)
missions, and later for deploying torpedoes and land-attack
bombs.  The United States first employed drones in a
combat role in the course of the Vietnam War, including the
AQM-34   Firebee. The Firebee initially flew in the 1950s as
an aerial gunnery target drone, and then in the 1960s as an
intelligence-collection drone, and ultimately was modified
to deliver payloads in 2002. In September 2000, the United
States used an ISR drone over Afghanistan to find Osama
Bin Laden as he was being sought for his role in the 1998
terrorist attacks against the U.S. embassies in Kenya and
Tanzania. After the drone proved successful in ISR
operations-and  in response to a need for additional lethal
tools after the attacks of 9/11-the U.S. military
increasingly outfitted drones with lethal payloads and
deployed them to a variety of geographic locations where
suspected terrorists resided.

While the specific number of global armed drones being
used for counterterrorism missions is not publicly available,
reporting suggests that the U.S. use of armed drones has
increased in the 20 years since they were first employed.
For example, from 2010 through 2020, the United States
undertook over 14,000 drone strikes in Afghanistan,
Pakistan, Somalia, and Yemen. Some  security observers
have suggested that, as the United States has withdrawn
troops from many overseas locations and transitioned away
from manned  counterterrorism missions, it is likely the use
of armed drones will increase.

Types  of Targets:  Surveillance or  Kinetic Strikes
Drones perform  a variety of national security missions for
the United States. Specific to how armed drones support
counterterrorism missions, the following are commonly
performed functions:


  Identifying High-Value Targets: conducting ISR to
   identify terrorist leaders or those possessing special
   skills deemed to be a significant threat to the United
   States. Operators can use both armed and unarmed
   drones for such a mission.

  Executing Signature Strikes: lethally targeting
   unidentified individuals based on behaviors, patterns,
   and locations often associated with terrorist
   organizations.

  Targeting Equipment/Facilities: destroying buildings or
   training areas used to house or support terrorist activity.

Figure  1. Armed  Predator  Drone


Source: U.S. Department of Defense Photos.


Possible Advantages of Using Armed Drones
Some  national security professionals suggest there are
many  positive aspects to the use of armed drones instead of
traditional manned aircraft, including the following:

  Safety: unmanned  drones reduce the risk that a pilot
   could be killed, injured, or captured should the platform
   be damaged  or destroyed.

  Precision: the ability of unmanned drones to get closer
   to ground-based targets than traditional aircraft could
   enables greater precision in targeting, thereby reducing
   the risk of unintentional death and injury to
   noncombatants  and destruction of civilian property.

  Loitering: drones are able to linger and surveil targets
   for longer than manned aircraft.

  Expense: the costs associated with acquiring,
   maintaining, and operating unmanned drones are less
   than that of manned aircrafts. In addition, the costs and
   accompanying  employment  benefits associated with


https://crsreports.congress.gov

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