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| Alaska Region |  - Anchorage, Alaska (AFC)
  - Fairbanks, Alaska (AFG)
  - Juneau, Alaska (AJK)
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| Central Region |  - Denver/Boulder, Colorado (BOU)
  - Grand Junction, Colorado (GJT)
  - Pueblo, Colorado (PUB)
  - Chicago, Illinois (LOT)
  - Lincoln, Illinois (ILX)
  - Indianapolis, Indiana (IND)
  - Northern Indiana (IWX)
  - Quad Cities, IL/IA (DVN)
  - Des Moines, Iowa (DMX)
  - Dodge City, Kansas (DDC)
  - Goodland, Kansas (GLD)
  - Topeka, Kansas (TOP)
  - Wichita, Kansas (ICT)
  - Jackson, Kentucky (JKL)
  - Louisville, Kentucky (LMK)
  - Paducah, Kentucky (PAH)
  - Detroit/Pontiac, Michigan (DTX)
  - Gaylord, Michigan (APX)
  - Grand Rapids, Michigan (GRR)
  - Marquette, Michigan (MQT)
  - Duluth, Minnesota (DLH)
  - Minneapolis/Twin Cities, Minnesota (MPX)
  - Kansas City/Pleasant Hill (EAX)
  - Springfield, Missouri (SGF)
  - St. Louis, Missouri (LSX)
  - Hastings, Nebraska (GID)
  - North Platte, Nebraska (LBF)
  - Omaha/Valley, Nebraska (OAX)
  - Bismarck, North Dakota (BIS)
  - Grand Forks, North Dakota (FGF)
  - Aberdeen, South Dakota (ABR)
  - Rapid City, South Dakota (UNR)
  - Sioux Falls, South Dakota (FSD)
  - Green Bay, Wisconsin (GRB)
  - La Crosse, Wisconsin (ARX)
  - Milwaukee/Sullivan, Wisconsin (MKX)
  - Cheyenne, Wyoming (CYS)
  - Riverton, Wyoming (RIW)
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| Eastern Region |  - Caribou, Maine (CAR)
  - Gray/Portland, Maine (GYX)
  - Boston, Massachusetts (BOX)
  - Mount Holly/Philadelphia, New Jersey (PHI)
  - Albany, New York (ALY)
  - Binghamton, New York (BGM)
  -  (BUF)
  - New York/Upton, New York (OKX)
  - Newport/Morehead City, North Carolina (MHX)
  - Raleigh, North Carolina (RAH)
  - Wilmington, North Carolina (ILM)
  - Cleveland, Ohio (CLE)
  - Wilmington, Ohio (ILN)
  - Pittsburgh, Pennsylvania (PBZ)
  - State College, Pennsylvania (CTP)
  - Charleston, South Carolina (CHS)
  - Columbia, South Carolina (CAE)
  - Greenville-Spartanburg, South Carolina (GSP)
  - Burlington, Vermont (BTV)
  - Baltimore/Washington, Virginia (LWX)
  - Blacksburg, Virginia (RNK)
  - Wakefield, Virginia (AKQ)
  - Charleston, West Virginia (RLX)
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| Pacific Region |  - Tiyan, Guam (GUM)
  - Honolulu, Hawaii (HFO)
  - Pago Pago, American Samoa (PPG)
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| Southern Region |  - Birmingham, Alabama (BMX)
  - Huntsville, Alabama (HUN)
  - Mobile/Pensacola, Alabama (MOB)
  - North Little Rock, Arkansas (LZK)
  - Jacksonville, Florida (JAX)
  - Key West, Florida (KEY)
  - Melbourne, Florida (MLB)
  - Miami, Florida (MFL)
  - Tallahassee, Florida (TAE)
  - Tampa, Florida (TBW)
  - Peachtree City/Atlanta, Georgia (FFC)
  - Lake Charles, Louisiana (LCH)
  - New Orleans/Baton Rouge, Louisiana (LIX)
  - Shreveport, Louisiana (SHV)
  - Jackson, Mississippi (JAN)
  - Albuquerque, New Mexico (ABQ)
  - Norman/Oklahoma City, Oklahoma (OUN)
  - Tulsa, Oklahoma (TSA)
  - San Juan, Puerto Rico (SJU)
  - Memphis, Tennessee (MEG)
  - Morristown/Knoxville, Tennessee (MRX)
  - Nashville, Tennessee (OHX)
  - Amarillo, Texas (AMA)
  - Austin/San Antonio, Texas (EWX)
  - Brownsville, Texas (BRO)
  - Corpus Christi, Texas (CRP)
  - Fort Worth-Dallas, Texas  (FWD)
  - El Paso, Texas (EPZ)
  - Houston/Galveston, Texas (HGX)
  - Lubbock, Texas (LUB)
  - Midland/Odessa, Texas (MAF)
  - San Angelo, Texas (SJT)
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| Western Region |  - Flagstaff, Arizona (FGZ)
  - Phoenix, Arizona (PSR)
  - Tucson, Arizona (TWC)
  - Eureka, California (EKA)
  - Los Angeles/Oxnard, California (LOX)
  - Sacramento, California (STO)
  - San Diego, California (SGX)
  - San Francisco Bay Area/Monterey, California (MTR)
  - San Joaquin Valley/Hanford, California (HNX)
  - Boise, Idaho (BOI)
  - Pocatello, Idaho (PIH)
  - Billings, Montana (BYZ)
  - Glasgow, Montana (GGW)
  - Great Falls, Montana (TFX)
  - Missoula, Montana (MSO)
  - Elko, Nevada (LKN)
  - Las Vegas, Nevada (VEF)
  - Reno, Nevada (REV)
  - Medford, Oregon (MFR)
  - Pendleton, Oregon (PDT)
  - Portland, Oregon (PQR)
  - Salt Lake City, Utah (SLC)
  - Seattle, Washington (SEW)
  - Spokane, Washington (OTX)
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