There are several self defense products you can purchase for your own personal protection. You will need to make sure they approved to bring on your flight within the checked-in luggage, and that they are legal in the state or country you are visiting. One product that may be taken most anywhere is a personal alarm. It is a small security device that produces an ear splitting howl when activated. Use one when you are in danger or in need of immediate attention. When the alarm sounds, everyone within a few block radius will hear it and look in your direction. Read more »