In January 2005 McCarran began offering complimentary Wi-Fi throughout its passenger terminals . The service initially covered , making it the largest free Wi-Fi zone among U.S. airports at the time . The northeast wing of the D Gates opened in April 2005 , along with a air traffic control tower at the center of the concourse . The expansion had been postponed following the September 11 attacks but resumed amid high growth in passenger traffic . Later in the year , the airport started a baggage-tracking system using radio-frequency identification ( RFID ) tags . Small RFID transmitters are inserted into baggage tags to improve bag identification , thereby lowering the risk for lost or misplaced luggage . McCarran became one of the first airports worldwide to conduct RFID tagging on a large scale
September 11 attacks
September 11 attacks
McCarran International Airport