Personal self-defense device designer, developer and marketer. Create "S-T-O-P: Self-defense TO all Places" -- the only self-defense device you can take everywhere.
I have a Conceal Carry Permit and have practiced martial arts, but I know the limitations of both.
One day, I took public transport to the airport with just a carry on bag. I left my pepper spray at home because it's not allowed on airplanes. A young woman was harassed on the train by several large me and I had few options. Thankfully it did not escalate.
I committed to never be in a situation without self-defense. That inspired the creation of S-T-O-P.