Question: Between Phoenix Sky Harbor International Airport and Williamson County Regional Airport, which airport was renamed to honor veterans and better reflect the regional nature of the airport?

Context paragraphs:
Williamson County Regional Airport: Veterans Airport of Southern Illinois (IATA: MWA, ICAO: KMWA, FAA LID: MWA) , formally known as the Williamson County Regional Airport, is five miles west of Marion, in Williamson County, Illinois.  The airport is owned by the Williamson County Airport Authority.  It sees one airline, subsidized by the federal government's Essential Air Service program at a cost of $2,104,616 (per year).  On November 11, 2016 during the grand opening ceremony for the new terminal, the airport was renamed to "Veterans Airport of Southern Illinois" to honor veterans and better reflect the regional nature of the airport.

Phoenix–Mesa Gateway Airport: Phoenix–Mesa Gateway Airport (IATA: AZA, ICAO: KIWA, FAA LID: IWA) , formerly Williams Gateway Airport (1994–2008) and Williams Air Force Base (1941–1993), is in the southeastern area of Mesa, Arizona, and 20 mi southeast of Phoenix, in Maricopa County, Arizona.  The airport is owned and operated by the Phoenix–Mesa Gateway Airport Authority, and is a reliever airport for Phoenix Sky Harbor International Airport.  It is a base for Allegiant Air.  The airport authority is governed by a six-member board: the mayors and tribal governor of the town of Gilbert, city of Mesa, town of Queen Creek, Gila River Indian Community, city of Phoenix, and the city of Apache Junction.

Goldwater Air National Guard Base: Goldwater Air National Guard Base, formerly Sky Harbor Air National Guard Base, is a facility of the United States Air National Guard that exists adjacent to Phoenix Sky Harbor International Airport.  It was built as the result of a 99-year lease in 1949, and was rebuilt in the 1990s to accommodate the creation of a third runway at the airport.

GateWay Community College: GateWay Community College is an urban campus established in 1968 located in Phoenix, Arizona, near Phoenix Sky Harbor International Airport.  GateWay is one of ten regionally accredited colleges in the Maricopa County Community College District.  The Maricopa Skill Center is a division of GateWay.

Southwest Airlines Flight 812: Southwest Airlines Flight 812 (SWA812, WN812) was a passenger flight which suffered rapid depressurization at 34400 ft near Yuma, Arizona, leading to an emergency landing at Yuma International Airport, on April 1, 2011.  The incident caused minor injuries to two of the 123 aboard.  The aircraft involved, a Boeing 737–300, was operating Southwest Airlines' domestic scheduled service from Phoenix Sky Harbor International Airport, Phoenix, Arizona, to Sacramento International Airport, Sacramento, California.

Arizona State Route 153: State Route 153, also known as SR 153 and the Sky Harbor Expressway, is a former state highway in Maricopa County, in the U.S. state of Arizona, that ran from the intersection of 44th Street and Washington Street in Phoenix south to University Drive.  It was a controlled access arterial expressway, with a speed limit of 45 mi/h , lower than the standard freeway speed of 65 mi/h .  Route 153 was a north–south route that skirted the eastern edge of Sky Harbor International Airport, and along with SR 143, SR 153 served a portion of East Valley residents with access to the airport.  Many motorists used SR 143 (the Hohokam Expressway) instead, because of its quick access to and from Interstate 10 and Loop 202.  The freeway did, however, provide a direct link to office developments in the Southbank commercial project in east Phoenix with the city of Tempe.

Phoenix Deer Valley Airport: Phoenix Deer Valley Airport (IATA: DVT, ICAO: KDVT, FAA LID: DVT) is a public airport 17 mi north of Phoenix, in Maricopa County, Arizona.  It is owned by the City of Phoenix.  The FAA's National Plan of Integrated Airport Systems for 2009–2013 categorized it as a "reliever airport" for Phoenix Sky Harbor International Airport.

Phoenix Sky Harbor International Airport: Phoenix Sky Harbor International Airport (IATA: PHX, ICAO: KPHX, FAA LID: PHX) is a civil-military public airport 3 mi southeast of downtown Phoenix, in Maricopa County, Arizona, United States.  It is Arizona's largest and busiest airport, and among the largest commercial airports in the United States.  PHX covers 3,400 acres (1,376 ha).

PHX Sky Train: The PHX Sky Train is a free, 24-hour electric people mover at Phoenix Sky Harbor International Airport in Phoenix, Arizona.  The first segment opened to the public on April 8, 2013.  The second segment, extending the train to Terminal 3 (with a walkway to Terminal 2) opened on December 8, 2014

Tucson International Airport: Tucson International Airport (IATA: TUS, ICAO: KTUS, FAA LID: TUS) is a public joint civil-military airport owned by the City of Tucson 8 mi south of downtown Tucson, in Pima County, Arizona.  It is the second busiest airport in Arizona, after Phoenix Sky Harbor International Airport.

Supporting paragraphs: Phoenix Sky Harbor International Airport Williamson County Regional Airport
Answer: Williamson County Regional Airport