I want to talk a little more about the 3-D printing , we have learn that 3D printing is becoming more popular now days, the cost of getting one is really cheap, and many people can just go and purchase one and try to design something and printed, not many skills are needed to learn how to used it. Now, we as a scientist and engineers are taking this idea and try to make it work in the biological aspect, which raise the rage of many people that believe in their religion, this allow to set back and make it harder to be approved, of course this is not only that it set back but also the application behind. I have seen that with this machine we can improve a lot in the medical field. It would help a lot of patients health problem but unfortunately a lot of the ideas haven’t been approve that is why we as a engineers needs to keep improving this. hopefully soon we can used it and help to save many people life and also help others people to see that isn’t a bad idea, even if their religion believe is not.