discovery, they found a second parchment copy of the declaration of independence at a records office in southern england. for a long time, no one knew where this copy existed or whether or not there was actually another parchment copy of the document altogether. joining us now is daniel allen, a harvard professor and director of research project. it's great to have you. i have to ask you about this project. first of all, how did you even start on this endeavor? >> i wrote a book about the declaration of independence a couple years ago and a couple of mysteries emerge from that. to this day, nobody knows what form of the declaration king george software example. i set off looking for that. it's also the case that we have two different versions of the declaration. it ends when they say they're going to effect their safety and