Display all the US in GE (Zoom) then you will see small dark grey areas in the white map, its all cities covered:
Location Meters Date
Albuquerque, NM 0.25 3/28/2002
Amarillo, TX 0.25 4/16/2002
Atlanta, GA 0.25 4/6/2002
Baton Rouge, LA 0.25 3/22/2002
Charlotte, NC 0.25 4/2/2002
Chicago, IL 0.25 4/10/2002
Dallas, TX 0.25 2/1/2001
Detroit, MI 0.25 4/10/2002
El Paso, TX 0.25 3/25/2002
Fort Wayne, IN 0.25 4/10/2002
Fresno, CA 0.25 6/6/2002
Houston, TX 0.25 1/27/2002
Jackson, MS 0.25 3/20/2003
Lexington, KY 0.25 4/1/2002
Lincoln, NE 0.25 4/17/2002
Los Angeles, CA 0.25 3/29/2004
Lubbock, TX 0.25 3/12/2002
Mobile, AL 0.25 3/11/2002
Modesto, CA 0.25 3/8/2002
Montgomery, AL 0.25 3/23/2002
Oklahoma City, OK 0.25 3/26/2002
Orlando, FL 0.25 6/4/2002
Portland, OR 0.25 5/8/2002
Providence, RI 0.25 4/26/2002
Raleigh - Durham, NC 0.25 3/28/2002
Sacramento, CA 0.25 5/9/2002
Seattle, WA 0.25 6/13/2002
Shreveport, LA 0.25 3/23/2002
Springfield, MA 0.25 4/1/2001
St. Louis, MO 0.25 3/22/2002
Stockton, CA 0.25 5/14/2002
Tampa - St. Petersburg, FL 0.25 5/10/2002
Tucson, AZ 0.25 10/9/2002
Washington, D.C. 0.25 4/26/2002