there are apps that come with tags and notifications, runrageous is one of them. an app on the phone, press a panic button that will alert your "in case of emergency" and emergency people that there's something wrong. >> dr. travis: what i have learned from this, i love it when i see people out running with a dog, #1, that's a wearable armament of itself. but wearing something that anyone out there running, especially women, have something on your person that can notify anyone around you that there's something going on. because that's where people can call 9-1-1. and you want to prevent what happened to these three women. >> uh-huh. >> dr. travis: what i upon happy about, jen, is you coming on the show, and saying "look women, keep running". it keeps you happy. don't run scared. run aware. >> you cannot let those kinds of worries stop living. >> exactly. smug enjoy. >> run -- something you enjoy. >> running is empowering for women, getting out there and feeling confident. doing these types of things. be supportive. it's an extra step. bringing something with you,