Enterprise Holdings, which owns and operates the largest fleet of rental cars in the world under the Alamo Rent A Car, National Car Rental, and Enterprise Rent-A-Car brands, will announce today that it is ending its relationship with Orbitz.com and its sister site CheapTickets.com on April 1 after “months of difficult discussions.” I asked Pam Nicholson, the president and chief operating officer of Enterprise Holdings, to explain the decision and what it means to travelers.

Bob Crandall talks about airport security, Qantas to cut flights because of high fuel prices, travel smartphone apps only beginning