A point to note if you’re checking in luggage is that many of the travel accessories that are sold as luggage security items (locks, cable ties, security seals, etc) do not actually work to protect your luggage. You’d think for the money spent on these things it would take time to break into a bag, but it’s as simple as several seconds with a paperclip or even a pen. And people wonder why there is a problem with luggage theft. This site shows how the criminals do it: http://www.securoseal.com/main.php?id=318. The same site has also got news stories from around the world on airport and luggage related crime here: http://www.securoseal.com/main.php?id=325 – so it's worth a read if you’re planning on taking a trip soon.