Myself, son-in-law, daughter, and 3 yr. old granddaughter have just returned from DW.  Were there from 9/9 to 9/22.  We flew Southwest from upstate New York and rented a car from National upon arrival at the airport.  After the terrorist attacks and all that insued as a result we decided that when we left on 9/22 we would keep the rental car and drive all the way home instead.  We all braced ourselves for what this decision might cost us and sat with credit cards, ATM cards, & cash in hand as my son-in-law made the dreaded phone call.  Imagine our surprise when he was told the only additional charge would be the regular $22 a day rental rate and there would be NO charge for the mileage nor any penalty for the change in the drop-off location!!  Could have run right over there and kissed those people!  Southwest was also awesome - NO questions asked - just refunded our airfare in full..  I'm sorry that you're so bitter over your experience with National but as far as I'm concerned when it came to a very serious matter they came through with flying colors and I will continue to use their car rentals whenever I travel.