printer, how they can make a gun or other nonliving things, but the next thing is replacing organs. printing organs. >> it is the same technology instead of an ink-jet printer. there are other organic compounds and a computer generate the three-dimensional image. this has been accomplished already in children woborn witht a windpipe. three dim me thinknal tracheas implanted in these children. these children are doing as well now. we will be able to serve patients who normally may die waiting on a transplant list. >> which is about 18 people today most waiting for kidneys.