printing in space to make tools. you may remember apollo 13. what if they had a 3d printer in space? we go further and we look at being able to print particular spacecraft. stuart: is this american technology? >> absolutely. we look at manufacturing for space. we are also looking at manufacturing and space. that has been true since the 50s. we are looking at american industry and leveraging what is happening in american industry. stuart: we promised our viewers a geewhiz segment. i think that you delivered. thank you for joining us.