Question: San Bernardino International Airport was located on the site of the facility that was how far east of downtown?

Context paragraphs:
San Bernardino High School: San Bernardino High School is a public high school located in the "Uptown neighborhood" of San Bernardino, California.  San Bernardino High School is located north of Downtown San Bernardino and south of San Bernardino's University District.  It is a part of the San Bernardino City Unified School District.  SBHS is the only high school which has been chartered as a city, known as Cardinal City.  SBHS is also the oldest high school in the City of San Bernardino.  The main address is 1850 North E Street.

San Bernardino International Airport: San Bernardino International Airport (IATA: SBD, ICAO: KSBD, FAA LID: SBD) (SBIA) is a public airport located less than two miles (3 km) southeast of the city center of San Bernardino, California, in San Bernardino County, California, USA.  The airport covers 1329 acre and has one runway.  The facility is currently operating as a general aviation and cargo airport located on the former site of Norton Air Force Base, which was built as the San Bernardino Air Depot in 1942 and which was decommissioned in March 1994.  A non-federal control tower (NFCT) began operation on November 9, 2008, and is operated under contract by SERCO company personnel.

Omnitrans: Omnitrans is a public transportation agency in San Bernardino County, California, United States.  The largest transit operator within San Bernardino County, it serves the San Bernardino Valley.  The agency was established in 1976 through a joint powers agreement and today includes 15 cities and portions of the unincorporated areas of San Bernardino County.  In addition to the southwestern corner of San Bernardino County, Omnitrans provides service to parts of Riverside and Los Angeles Counties.  Omnitrans currently carries about 14 million passengers per year, and although the system has enjoyed strong growth in recent years, the trend has leveled off and ridership has actually declined slightly in the most recent 24-month period.  Omnitrans currently operates 27 fixed routes as well as a general public dial-a-ride service, “Omnilink,” and a paratransit service for the disabled, “Access.”  Omnitrans operates throughout the urbanized area of southwestern San Bernardino County: south of the San Bernardino Mountains, from Upland, Montclair, and Chino in the west to Redlands, California and Yucaipa in the east.  The Omnitrans service area covers approximately 456 sqmi .

Norton Air Force Base: Norton Air Force Base (IATA: SBD) (1942–1994) was a United States Air Force facility 2 mi east of downtown San Bernardino, California, in San Bernardino County.

Ontario International Airport: Ontario International Airport (IATA: ONT, ICAO: KONT, FAA LID: ONT) is a public airport two miles east of downtown Ontario, a city in San Bernardino County, California, US, about 22 mi west of Downtown San Bernardino and 38 mi east of Downtown Los Angeles.  It is currently owned and operated under a joint powers agreement with the city of Ontario and San Bernardino County.  The year 2007 saw the peak in passenger traffic with 7.2 million passengers.  More recently, in 2015, 4.2 million passengers used the airport, slightly higher than in 2014 with 4.1 million passengers.

San Bernardino, California: San Bernardino is a city located in the Riverside-San Bernardino metropolitan area (sometimes called the "Inland Empire").  It serves as the county seat of San Bernardino County, California, United States.  As one of the Inland Empire's anchor cities, San Bernardino spans 81 sqmi on the floor of the San Bernardino Valley and has a population of 209,924 as of the 2010 census.  San Bernardino is the 17th-largest city in California and the 100th-largest city in the United States.  San Bernardino is home to numerous diplomatic missions for the Inland Empire, being one of four cities in California with numerous consulates (the other three being Los Angeles, San Diego and San Francisco).  The governments of Guatemala and Mexico have also established their consulates in the downtown area of the city.

Downtown San Bernardino: Downtown San Bernardino is a district in the city of San Bernardino, California, in San Bernardino County, United States.  It is home to city and county government buildings, and to the city's central business district.  The downtown area of San Bernardino is home to multiple (and the only) diplomatic missions for the Inland Empire, being one of only four California cities with multiple consulates (the other cities being Los Angeles, San Diego and San Francisco).  The governments of Guatemala (opened July 2014) and Mexico have established their consulates in the civic center.  Downtown San Bernardino is bounded by I-215 to the west, Waterman Avenue to the east, Baseline Street to the north, and Mill Street to the south.

University District, San Bernardino: The University District, often referred to as University Parkway, is a foothill community located approximately 5–8 miles north of downtown San Bernardino, California.  The District is named after the California State University, San Bernardino.  It is one of the most desirable neighborhoods in San Bernardino along with the Hospitality Lane District.  As California State University, San Bernardino grew so did the region around it; it used to be nothing but mid-desert farmland, but has been developing quickly to become a major and important independent neighborhood to not only San Bernardino but also the entire region.

Stater Bros.: Stater Bros.  Markets is a privately held supermarket discount chain, based in San Bernardino, California, consisting of 169 stores located throughout Southern California.  It was founded in Yucaipa, California on August 17, 1936 by Cleo and Leo Stater (with help from younger brother Lavoy) when they purchased the original Stater Bros.  Market from W.A. Davis with a $600 down payment.  It entered the Fortune 500 for the first time in 2006 at #493, the first notable Inland Empire-based company to do so.  On September 10, 2006, the headquarters began construction of a 2000000 sqft facility at San Bernardino International Airport (formerly Norton Air Force Base) from its former location on the Colton–Grand Terrace border.

San Bernardino County Court House: The San Bernardino County Court House, located at 351 N. Arrowhead Ave. in San Bernardino, is the county courthouse for San Bernardino County, California.  The courthouse was built in 1927 and has served as the center of county government since then.  San Bernardino architect Howard E. Jones designed the courthouse in the Classical Revival style; the courthouse is the only surviving Classical Revival building in San Bernardino.  The building's design features classical columns spanning the second and third floors, a parapet along the roof line, regularly spaced windows, and extensive use of projecting blocks on the front facade.  The courthouse is faced with unpainted stone and stucco, an uncommon design choice.  A 1937 welfare building, a 1940 county library, and a 1940 heating plant are also located on the courthouse grounds, which are extensively landscaped and include a fountain, sundial, plaque, and the remains of the former county courthouse.

Supporting paragraphs: San Bernardino International Airport Norton Air Force Base
Answer: 2 mi