When Presidents sign something really big they sign each letter with a different pen and give them to key participants as souvenirs. I've been wondering how he got through 22 pens on just "Barack Obama". It looks like he broke the "O" into five or six parts.
Franklin Delano Roosevelt and George Herbert Walker Bush were born for such occasions.
Someday we should have a President named Winchester Jamison Clarke Barrington-Smythefield-Hickenlooper IV and then we could all get a pen.
History doesn't record who received the ceremonial pens that got us into the Iraq War, but I'm sure they are proudly displayed on the mantle next to the gun they shoot their hunting partners with.