Question: In which California county is the Distinguished Flying Cross National Memorial located?
Context: Joseph Christopher McConnell, Jr. (30 January 1922 – 25 August 1954) was a United States Air Force fighter pilot who was the top American flying ace during the Korean War.  A native of Dover, New Hampshire, Captain McConnell was credited with shooting down 16 MiG-15s while flying North American F-86 Sabres.  He was awarded the Distinguished Service Cross, Silver Star, and the Distinguished Flying Cross for his actions in aerial combat.  McConnell was the first American triple jet-on-jet fighter ace and is still the top-scoring American jet ace. Air Vice Marshal Edgar James Kingston-McCloughry, {'1': ", '2': ", '3': ", '4': "} (10 September 1896 – 15 November 1972), born Edgar James McCloughry, was an Australian fighter pilot and flying ace of the First World War, and a senior commander in the Royal Air Force during the Second World War.  He shot down 21 aircraft and military balloons during the former war, making him the 6th highest-scoring Australian ace.  He was also awarded the Distinguished Service Order and the Distinguished Flying Cross and Bar as well as being Mentioned in Despatches. Lieutenant Colonel Robert "Rosie" Rosenthal (June 11, 1917 – April 20, 2007) was a highly decorated pilot in the Eighth Air Force of the United States Army Air Forces in World War II, receiving sixteen awards including the Distinguished Service Cross for "extraordinary heroism in connection with military operations against the enemy," the Silver Star (with cluster) for "gallantry in action," the Distinguished Flying Cross (with cluster) for "heroism or extraordinary achievement during aerial flight," the Air Medal (with seven clusters) and the Purple Heart (with cluster), as well as the Distinguished Flying Cross from Great Britain and the Croix de Guerre from France.  Intelligence Officer Marvin Bowman is quoted describing Rosenthal as "one of the great figures of the Air Force; a shy, modest, and patriotic gentleman of truly amazing courage and achievement." William Spurrett Fielding Johnson MC and Bar, DFC (8 February 1892 – 10 February 1953) was a British military officer who served in both World War I and World War II.  Originally an Army officer, he later joined the Royal Flying Corps, and became a flying ace credited with six aerial victories, and ended the war as a captain with two awards of the Military Cross.  In World War II he served in the Royal Air Force, winning the Distinguished Flying Cross and rising to the rank of squadron leader. 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. Peter Stuart Isaacson, AM, DFC, AFC, DFM (31 July 1920 – 7 April 2017) was an Australian publisher and decorated military pilot.  He was the owner of Peter Isaacson Publications, publisher of various trade journals and suburban newspapers including the "Southern Cross" and the "Sunday Observer" in Melbourne.  During World War II, he served in the Royal Australian Air Force (RAAF) as a pilot with RAF Bomber Command and was awarded the Distinguished Flying Cross, the Air Force Cross and the Distinguished Flying Medal. The Distinguished Flying Cross National Memorial Act ( ; Pub.L.  113–132 ) is a U.S. public law that designates a memorial located at March Field Air Museum in Riverside, California, as the Distinguished Flying Cross National Memorial, in honor of current and former members of the Armed Forces who have been awarded the Distinguished Flying Cross.  The bill was introduced into the United States House of Representatives during the 113th United States Congress. Captain Walter George Raymond Hinchliffe {'1': ", '2': ", '3': ", '4': "} (10 June 1894 – 13 March 1928), also known as Hinch (the surname is often incorrectly given as Hinchcliffe) was a distinguished Royal Naval Air Service and Royal Air Force flying ace in World War I who was awarded the Distinguished Flying Cross.  A pioneering military and civilian flying career was cut short when he attempted a treacherous flight across the Atlantic Ocean with Elsie Mackay in a single engined Stinson Detroiter. Eugeniusz Horbaczewski (28 September 1917 – 18 August 1944) was a Polish fighter pilot, a flying ace of World War II, also known as "Dziubek" (the diminutive of 'the beak' in Polish).  According to official lists, Horbaczewski was the third highest scoring Polish fighter ace, with 16.5 confirmed kills (16 individual and one shared) and one probable kill.  He was awarded several decorations, among others Virtuti Militari IV class (posthumously) and V class, four times Polish Cross of Valour, Distinguished Service Order (posthumously) and Distinguished Flying Cross (twice). Vir Chakra is an Indian gallantry award presented for acts of bravery in the battlefield.  It replaced the British Distinguished Service Cross (DSC), Military Cross (MC) and Distinguished Flying Cross (DFC).  Award of the decoration carries with it the right to use Vr.C.  as a postnominal abbreviation (note the care to distinguish this abbreviation from that for the Victoria Cross (V.C.).  It is third in precedence in the war time gallantry awards and comes after the Param Vir Chakra and Maha Vir Chakra.
Answer: Riverside County