Level 1
CHICAGO IL
NEW YORK NY
ATLANTA GA
DALLAS/FORT WORTH TX
HOUSTON TX
LOS ANGELES CA
BOSTON MA
DENVER CO
MIAMI FL
SAN FRANCISCO CA
SEATTLE WA
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Level 2
NEWARK NJ
OKLAHOMA CITY
BALTIMORE MD
CHARLOTTE NC
DETROIT MI
FORT LAUDERDALE
LAS VEGAS NV
MINNEAPOLIS MN
ORLANDO FL
PHILADELPHIA PA
PHOENIX AZ
SALT LAKE CITY UT
SAN DIEGO CA
TAMPA FL
SAN JOSE
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The following do not need to be done.
PITTSBURG
SAN ANTONIO
JACKSONVILLE
ST LOUIS
RALEIGH/DURHAM
CLEVELAND
AMSTERDAM
ATHENS
BANGKOK
BEIJING
BERLIN
COPENHAGEN
DUBLIN
ISTANBUL
KUALA LUMPUR
LISBON
LONDON
MOSCOW
NEW DELHI
OSLO
ROME
SHANGHAI
SINGAPORE
STOCKHOLM
TAIPEI
TOKYO
VIENNA
ZURICH