Question:  What man-portable, counter-radio-controlled improvised explosive device (IED) jammer was built by a corporation headquartered in Sparks, Nevada?

Context paragraphs:
Pressure cooker bomb: A pressure cooker bomb is an improvised explosive device (IED) created by inserting explosive material into a pressure cooker and attaching a blasting cap into the cover of the cooker.

Ammunition technician: An ammunition technician (AT) is a British Army soldier, formerly of the Royal Army Ordnance Corps but since 1993 of the Royal Logistic Corps, trained to inspect, repair, test, store, and modify all ammunition, guided missiles, and explosives used by the British Army.  These technicians are also trained to use demolition to safely dispose of individual items of ammunition and explosives (EODs) or to conduct logistics disposal of bulk stocks of multi items.  After gaining sufficient experience, those who show the appropriate qualities are given extra training to render safe improvised explosive devices (IEDs) by a process called improvised explosive device disposal.  Experienced ATs may be called to give evidence as expert witnesses in criminal or coroner's courts in relation to ammunition or explosives or to EOD and IEDD duties.

Barrel bomb: A barrel bomb is an improvised unguided bomb, sometimes described as a flying IED (improvised explosive device).  They are typically made from a large barrel-shaped metal container that has been filled with high explosives, possibly shrapnel, oil or chemicals as well, and then dropped from a helicopter or airplane.  Due to the large amount of explosives (up to 1000 kg ), their poor accuracy and indiscriminate use in populated civilian areas (including refugee camps), the resulting detonations have been devastating.  Critics have characterised them as weapons of terror and illegal under international conventions.

Joint Improvised-Threat Defeat Organization: The Joint Improvised-Threat Defeat Organization (JIDO, pronounced like "JI-DOH") is a combat support organization of the U.S. Department of Defense (DoD) organization under the Defense Threat Reduction Agency (DTRA) that deals with improvised threats such as the improvised explosive device (IEDs).  JIDO was born from the Joint IED Defeat Organization established in 2006, which focused on IEDs.  JIDO's mission is to "enable Department of Defense actions to counter improvised threats with tactical responsiveness and anticipatory acquisition in support of combatant commanders' efforts to prepare for, and adapt to, battlefield surprise."  This mission supports counter-terrorism, counter-insurgency and other related mission areas including Counter-IED.

Sierra Nevada Corporation: Sierra Nevada Corporation (SNC) is an American privately held electronic systems provider and systems integrator specializing in microsatellites, telemedicine, and commercial orbital transportation services.  Sierra Nevada Corporation operates under the leadership of Chief Executive Officer, Fatih Ozmen and President, Eren Ozmen.  The company contracts with the United States Armed Forces, NASA and private spaceflight companies.  It is headquartered in Sparks, Nevada.

Oktoberfest bombing: The Oktoberfest bombing was a terrorist attack with a right-wing radical background.  On 26 September 1980, 13 people died and 211 were injured after the explosion of an improvised explosive device at the main entrance of the Oktoberfest in Munich, West Germany.  The attack is considered to be the most severe act of terrorism in post-war West Germany.  The attack was attributed to the right-wing extremist and geology student Gundolf Köhler who was killed while placing the explosive device; however, doubts remain as to whether he acted alone.  Attempts to re-open the investigation in the years following the bombing have not been successful.

Surgically implanted explosive device: A surgically implanted improvised explosive device (SIIED) is an explosive device hidden inside the body of a person in order to commit a suicide attack.  This type of terrorist weapon, more commonly known as Body Cavity Bomb (BCB), is only known to have been used once, in a failed assassination attempt.

Thor III: The THOR III is man-portable, counter-radio-controlled improvised explosive device (IED) jammer built by Sierra Nevada Corp and employed by the U.S. Army, U.S. Marine Corps, and partnered Afghan National Army soldiers in Afghanistan.  Sierra Nevada received the initial contract in December 2007.  This system uses three transceivers mounted on backpacks to jam radio-controlled IEDs; each of the three different transceivers jams a different frequency bandwidth (Low, Mid, and High).

Lob bomb: A lob bomb (known officially as an improvised rocket-assisted mortar, improvised rocket-assisted munition, or IRAM) is a rocket-fired improvised explosive device made from a large metal canister (usually a propane gas tank that has been drained of its contents and filled with explosives, scrap metal, and ball bearings), which has been used by insurgents and coalition forces during the Iraq War since late 2007.  The weapon is essentially an airborne version of an improvised explosive device.

Car bomb: A car bomb, or truck bomb, also known as a vehicle-borne improvised explosive device (VBIED), is an improvised explosive device placed inside a car or other vehicle and detonated.

Supporting paragraphs: Thor III Sierra Nevada Corporation
Answer: The THOR III