While Hertz, Avis, National, Thrifty, etc. spent billions competing for rental car customers at airports Enterprise went into the local communities with small offices, and now has twice their revenues and much higher profitability.

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Rental car stocks such as Budget and Dollar Thrifty fell considerably since the attack.

CNN: Car rentals, like airlines, hard hit after attacks

"Moving forward, we will continue to give to give customers choice among a robust selection of car rental options -- including Hertz, Avis, Budget, Dollar, Thrifty, Advantage and other leading suppliers -- that will fully meet travelers' needs, " the company said in a statement.

CNN: Orbitz, Enterprise car rentals part ways