The attack occurred on a Friday morning.
 ETA had observed similar convoys from the factory and planned their ambush based on information that they had gathered.
 The convoy consisted of four vehicles, the first carrying technicians, the third mortar devices produced by the factory and the second and fourth vehicles carrying three civil guards each.
 The vehicle left the factory at 0730 and at approximately 0815, had to slow down at a part of the road which consisted of numerous bends.
 The ETA members had chosen a spot near a small hill, where they were hidden from view by dense vegetation.
 After allowing the vehicle carrying the factory workers to pass, ETA launched a grenade at the second vehicle, causing it to be stuck in a layby and then attacked the civil guard's vehicles with assault rifles, machine guns and grenades, firing over 100 shots.
 In order to ensure that no civil guards survived, the ETA members approached the vehicles and threw a hand grenade into the first civil guard's vehicle.
 When they repeated this with the second vehicle, two ETA members, Gregorio Olabarría Gorrotxategui Bengoa and Javier Argote, were killed as a result of injuries suffered when they failed to escape in time before the grenades exploded.
 One of these was subsequently found 6 kilometres away from the attack, having apparently been moved there by his comrades.
 At 0845, a man had approached a bar near the scene and had asked in Basque for medical assistance.
Wilhelm Herz (18 January 1912, Lampertheim, Grand Duchy of Hesse – 5 January 1998) was a motorbike racer and land speed racer.
 He started his career in 1932 with DKW and went over to NSU in 1939.
 He ran races on national and international courses like the Berlin AVUS, Grenzlandring, Helsinki, Hockenheimring, Hohenstein-Ernstthal, Isle of Man, Monza, Nürburgring, Schleizer Dreieck, Schottenring and Solitude.
 He gained his international reputation through numerous world records on two- and four-wheeled vehicles.
 He set a motorcycle record in 1951 on the Munich - Ingolstadt motorway and repeated it at Bonneville Salt Flats, Utah in 1956.
 In this instance, he was the first person to ride a motorbike over 200 mph (320 km/h).
A cariole (also spelled carriole) was a type of carriage used in the 19th century.
 It was a light, small, two- or four-wheeled vehicle, open or covered, drawn by a single horse.
 The term is also used for a light covered cart or a dog-drawn toboggan.
 The name is French, derived from the Latin "carrus", vehicle.
The University of Texas Solar Vehicles Team (UTSVT) is a student organization at University of Texas at Austin that designs, creates and races solar vehicles.
 It is the only team from the state of Texas that has qualified in recent years to compete in national competitions.
 The team's most recent car, the Samsung Solorean, raced at the Formula Sun Grand Prix and the North American Solar Challenge.
The Red River Army Depot (RRAD) is an 15835 acre facility located 18 mi west of Texarkana, Texas, in Bowie County.
 The facility has over 3000000 sqft of storage capacity.
 RRAD was activated in 1941 to create an ammunition storage facility.
 The depot was supposed to be deactivated after the findings of the 1995 Base Realignment and Closure Commission.
 However, the depot remained open after the commission changed its mind.
 The depot was once again slated for closure upon recommendation from the 2005 BRAC commission, but has remained open to provide maintenance support for the army.
 The depot's primary mission is the maintenance and repair of all tactical wheeled vehicles, which includes repairing MRAPs and HUMVEEs. Letterkenny Army Depot took over some of RRAD's missile systems.
NAPA Speedway (formerly known as Sandia Motorsport Park and Sandia Motor Speedway) is a multiple use racing facility located near Albuquerque, New Mexico, USA.
 The complex provides two short ovals, a multiple configuration road course, Kart racing ovals, 3/8 Mile Dirt Oval, and a motocross area.
 They ran a NASCAR K&N Pro Series West race in September 2012.
The Fennek, named after the fennec (a species of small desert fox), or LGS Fennek, with LGS being short for "Leichter Gepanzerter Spähwagen" in German (Light Armoured Reconnaissance Vehicle), is a four-wheeled armed reconnaissance vehicle produced by the German company Krauss-Maffei Wegmann and Dutch Defence Vehicle Systems.
 The Turkish company FNSS Defence Systems acquired the right for licence production in 2004.
 It was developed for both the German Army and Royal Netherlands Army to replace their current vehicles.
Biomot (its badge was only in Greek, the brand spelled "Βιομότ") was a small manufacturer of three-wheeled trucks and other metal products, based in Patras, Greece.
 Its trucks, produced since 1967, originally used rear-mounted VW air-cooled engines, as well as other VW parts.
 By 1975 the market for such vehicles was vanishing in Greece, as they were gradually being replaced by four-wheeled imported types, and a new “modernized” front-engined model introduced by Biomot failed to save the company.
Kart racing or karting is a variant of open-wheel motorsport with small, open, four-wheeled vehicles called "karts", "go-karts", or "gearbox/shifter karts" depending on the design.
 They are usually raced on scaled-down circuits.
 Karting is commonly perceived as the stepping stone to the higher ranks of motorsports.
A coach is originally a large, usually closed, four-wheeled carriage with two or more horses harnessed as a "team", controlled by a coachman and/or one or more postilions.
 It had doors in the sides, with generally a front and a back seat inside and, for the driver, a small, usually elevated seat in front called a "box, box seat" or coach box.
 The term "coach" first came into use in the 15th century, and spread across Europe.
 There are a number of types of coaches, with differentiations based on use, location and size.
 Special breeds of horses, such as the now-extinct Yorkshire Coach Horse, were developed to pull the vehicles.

Question: In which state is found a facility where small, open, four-wheeled vehicles are raced?
Answer: New Mexico