Damaged bags
In response to the person who noticed at home that her luggage was damaged:
You should always inspect your luggage when it comes off the baggage carousels. If you spot any significant damage, file a claim immediately with the airline baggage office inside the airport. The airline rep will usually insist on seeing the damage firsthand. About the only other course of action would be to write a letter to the carrier. You should be able to get a customer service address, telephone number or email address of the the airlines web site.

