Question: What do San Angelo Regional Airport and Abraham Lincoln Capital Airport have in common? 
Context: San Angelo Stadium is a stadium in San Angelo, Texas.  Built in 1956, it holds 17,500 people, and is primarily used for football.  It is home to the San Angelo Central Bobcats and the San Angelo Lakeview Chiefs. Texas Pacifico Transportation Ltd. (reporting mark TXPF) is a railroad operating company in West Texas that is owned by Grupo México.  The company operates over the South Orient Rail Line under a lease and operating agreement with the Texas Department of Transportation and Texas Pacifico Transportation, Ltd.  The South Orient Rail Line runs from the Mexican border town of Presidio, Texas to San Angelo Junction.  It was constructed to interchange with Ferromex at Presidio but the Presidio–Ojinaga International Rail Bridge has not been operational since a fire damaged it on 29 February 2008.  It interchanges with Union Pacific Railroad at Alpine, Texas, and with BNSF Railway and the Fort Worth and Western Railroad at San Angelo Junction.  The Texas Pacifico company began service in March 2001.  The line has been rehabilitated from San Angelo Junction (near Coleman), Texas, through San Angelo and on to Alpine, Texas.  Capital investment is planned for the remaining Excepted track. Capital Airport Air National Guard Station is a 91 acre facility on land leased from the Springfield Airport Authority (SAA), located on the grounds of Abraham Lincoln Capital Airport.  It is home to the 183d Fighter Wing (183 FW), an Illinois Air National Guard unit operationally gained by the Air Combat Command (ACC) and State Headquarters, Illinois Air National Guard.  Historically a fighter unit, the 183 FW consists of 321 full-time and 800 part-time military personnel (total strength 1,321). This bibliography of Abraham Lincoln is a comprehensive list of written and published works about or by Abraham Lincoln, 16th President of the United States.  In terms of primary sources containing Lincoln's letters and writings, scholars rely on "The Collected Works of Abraham Lincoln", edited by Roy Basler, and others.  It only includes writings by Lincoln, and omits incoming correspondence.  In the six decades since Basler completed his work, some new documents written by Lincoln have been discovered.  Currently, a project is underway at the Papers of Abraham Lincoln to provide "a freely accessible comprehensive electronic edition of documents written by and to Abraham Lincoln".  The Papers of Abraham Lincoln completed Series I of their project "The Law Practice of Abraham Lincoln" in 2000.  They electronically launched "The Law Practice of Abraham Lincoln, Second Edition" in 2009, and published a selective print edition of this series.  At present they are engaged in locating, digitizing, and transcribing documents for Series II (non-legal, pre-presidential materials) and Series III (presidential materials). Worry Bird is a North American P-51D-25NA Mustang (ser.  no. 44-73287) currently based at the Air Combat Museum at Abraham Lincoln Capital Airport in Springfield, Illinois.  The aircraft was built in 1944 and delivered to the United States Army Air Force (USAAF) in the following year to serve in World War II.  At the time, the P-51D was a major component of the USAAF fleet and "Worry Bird" escorted Allied bombers on long-range air raids in Germany. The San Angelo Outlaws are a defunct American minor professional ice hockey team that played in the Western Professional Hockey League from 1997 to 2001 and the Central Hockey League in the 2001–02 season.  They were based in San Angelo, Texas and played their home games out of the San Angelo Coliseum.  The WPHL ceased operations in 2001 and the Central Hockey League absorbed the remaining ten WPHL teams, including the Outlaws.  One year later, the team was renamed to the San Angelo Saints. The San Angelo Sheep Herders were a West Texas League baseball team based in San Angelo, Texas, United States that played in 1929.  They were the last team to play in San Angelo until the San Angelo Colts came about in 1948. San Angelo Regional Airport (IATA: SJT, ICAO: KSJT, FAA LID: SJT) , also known as Mathis Field, is a public airport serving the city of San Angelo, in Tom Green County, Texas, USA.  The airport covers 1503 acre and has three runways.  The airport also offers free parking. Abraham Lincoln Capital Airport (IATA: SPI, ICAO: KSPI, FAA LID: SPI) is a civil-military public airport in Sangamon County, Illinois.  It is three miles (6 km) northwest of downtown Springfield, the capital of Illinois.  The airport is owned by the Springfield Airport Authority (SAA). WXK33 (sometimes referred to as San Angelo All Hazards) is a NOAA Weather Radio station that serves the San Angelo metropolitan area and surrounding cities.  It is programmed from the National Weather Service forecast office in San Angelo, Texas with its transmitter located in San Angelo.  It broadcasts weather and hazard information for the following Counties: Coke, Concho, Irion, Runnels, Schleicher, Sterling, and Tom Green.
Answer: public airport