http://abcnews.go.com/Health/back-future-world-diy-prosthetics/story?id=20726015

This video was posted in October of 2013.  The bombing at the Boston Marathon was a tragedy and made many Americans recognize the large number of wounded soldiers that are amputees.  It also helped show how advanced we have come in technology and in prosthetics.  A victim in the Boston bombing that lost one of his legs has the first thought powered prosthetic leg which helped him to climb a 103 story building, the tallest in Chicago.However there is a problem with these prosthetic devices. They are very expensive, costing up to $50,000.