Question: what Airforce base is located in Riverside County, California?
Context: The 452d Air Mobility Wing is an Air Reserve Component of the United States Air Force.  It is assigned to the Fourth Air Force, Air Force Reserve Command, stationed at March Air Reserve Base, California.  If mobilized, the Wing is gained by the Air Mobility Command. March Air Reserve Base (IATA: RIV, ICAO: KRIV, FAA LID: RIV) (March ARB), previously known as March Air Force Base (March AFB) is located in Riverside County, California between the cities of Riverside and Moreno Valley.  It is the home to the Air Force Reserve Command's 4th Air Force (4 AF) Headquarters and the host 452d Air Mobility Wing (452 AMW), the largest air mobility wing of the 4th Air Force.  In addition to multiple units of the Air Force Reserve Command supporting Air Mobility Command, Air Combat Command and Pacific Air Forces, March ARB is also home to units from the Army Reserve, Navy Reserve, Marine Corps Reserve, California Air National Guard and the California Army National Guard.  For almost 50 years, March AFB was a Strategic Air Command base during the Cold War. The Hemet Maze Stone is a prehistoric petroglyph.  It is just outside Hemet in Reinhardt Canyon, within the Lakeview Mountains, in Riverside County, California.  On April 16, 1956, it was donated, along with 5.75 acre of land, to Riverside County, by Mr. and Mrs. Rodger E. Miller.  It is California Historical Landmark No.557.  The government has installed two perimeter chain link fences around the petroglyph landmark, making direct appreciation, study or an unobstructed picture difficult.  The surrounding land has been set aside for the protection of native plants and animals (with a warning that the “natural features may be hazardous”), and is at the end of California Avenue to the north of Highway 74 and east of Highway 215, near Hemet, California.  According to a sign where the road has been blocked off to prevent people from driving closer to the Maze Stone, people with questions can call the Riverside County Parks Open Space Office at 909-245-1212. The Riverside County Transportation Commission (RCTC) is the County Transportation Commission (a subdivision of the six-county Southern California Association of Governments metropolitan planning organization) for Riverside County, California, United States.  It is an association of local governments in the county, with policy makers consisting of mayors, councilmembers, and county supervisors, and is the funding agency for the county's transit systems, which include Corona Cruiser, Riverside Transit Agency, SunLine Transit Agency, Pass Transit Agency and Palo Verde Valley Transit Agency.  It also provides funds for city transit in Corona and Riverside and is one of Metrolink's five governing agencies. The Riverside County Sheriff's Department (RCSD or RSD), also known as the Riverside Sheriff's Office (RSO or RCSD), is a law enforcement agency in Riverside County, in the U.S. state of California.  Overseen by an elected sheriff-coroner, the department serves unincorporated areas of Riverside County as well as some of the incorporated cities in the county by contract (see contract city).  17 of the county's 26 cities, with populations ranging from 4,958 to 193,365, contract with the department for police services.  The county hospital and one tribal community also contract with the department for proactive policing.  Riverside County is home to 12 federally recognized Indian reservations.  Absent proactive policing and traffic enforcement, the department is responsible for enforcing criminal law on all Native American tribal land within the county.  This function is mandated by Public Law 280, enacted in 1953, which transferred the responsibility of criminal law enforcement on tribal land from the federal government to specified state governments including California.  The department also operates the county's jail system. The Riverside County Regional Park and Open-Space District ("RivCoParks"; and commonly, Riverside County Parks) is a special district operating in Riverside County, California.  The District’s focus encompasses providing high-quality recreational opportunities and preserving important features of the County’s Natural, Cultural and Historical heritage. Eric Frederic Linder (born October 9, 1978) is a candidate for Riverside County's board of Supervisors.  He is an American politician who once served in the California State Assembly.  He is a Republican who represented the 60th Assembly District, encompassing far western Riverside County.  Prior to being elected to the Assembly in 2012, he was a business owner and vice chair of the Riverside County Republican Party. Riverside is a city in Riverside County, California, United States, located in the Inland Empire metropolitan area.  Riverside is the county seat of the eponymous county and named for its location beside the Santa Ana River.  It is the most populous city in the Inland Empire and in Riverside County, and is located about 60 mi east of Los Angeles.  It is also part of the Greater Los Angeles area.  Riverside is the 59th most populous city in the United States and 12th most populous city in California.  As of the 2010 Census, Riverside had a population of 303,871. Rodric Anthony Pacheco (born May 7, 1958), usually known as Rod Pacheco, is an American politician.  He served in the Riverside County District Attorney's Office as a Deputy District Attorney, Chief Deputy District Attorney, Assistant District Attorney and then as District Attorney from 2007–2010 in Riverside County, California.  He served in the California State Assembly from 1996–2002.  He served as Republican leader from November 5, 1998 – April 6, 1999.  Pacheco was defeated on June 8, 2010, in his bid for a second term as Riverside County District Attorney.  In January 2011, SNR Denton, a global law firm, announced Pacheco would join the firm and serve in its Los Angeles office.  Pacheco became a Partner in Litigation, White Collar, and Public Policy Public Strategies Practice Groups at SNR Denton in January 2011.  Pacheco left SNR Denton in October 2014 to join Theodora Oringher PC.  Pacheco was recruited by Theodora Oringher PC to form and lead the White Collar/Internal Investigations Practice Group for the firm. The Jensen Alvarado Ranch is a historic park and museum in Riverside County, California, USA, and is operated by the Riverside County Regional Park and Open-Space District (RivCo Parks).  It can be accessed from 4350 Riverview Drive, Rubidoux or 4307 Briggs Street, Riverside.  It was the first kiln-fired brick building built in Riverside County, and is the oldest non-adobe structure in the Inland Empire.
Answer: March Air Reserve Base