>> on al jajeera america skwlfrn. >> welcome back to techknow. i am here with richelle, lindsey and phil. you were about to tell us about new technology. >> imagine you guys lose an arm in an accident. you may think your life will just never be the same. but i got to check out these robotic hands that have completely revolutionized how people can live their life. let's take a look. it's a an early scene played out in-households everywhere. besides getting his kids dressed and dropping them off at school, jason coburn must get himself ready. that means making important decisions about what he is going to be wearing today. >> being a bilateral amputee, you have to use prosthetics. if you are a single-arm amp tea, you have the ability to use a real hand to help, you know, it's kind of like a tool for them. >> near san diego, california, katie walker is putting her newest tool. this para olympic hopeful is trying out prosthetics field. >> the difference is the little wrist unit. it actually pops off. >> all right. >> and actually, the handle goes rig