crystal. >> that's right, and of course, wrist watches came about because they couldn't get their pocket watches out of their pockets with all their equipment. >> sure. what do we have here? >> that is an imperial russian flyers uniform. and, of course, the imperial russians went out of business in 1917 with the revolution. >> wow. >> i'll tell you what, i've been to your museum there in kansas city, missouri, it is fantastic. and if you're in the new york city area this weekend, check out the honoring our history world war i exhibit. it's going to be at the intrepid saturday through the 4th of july. >> last question for you, why were they called dough boys? >> they were called dough boys because when they were on the mexican border, they would be covered with adobe brick dust and they would go marching by and look at those marching adobes and it went to dough boys. >> nice seeing you. >> thank you very much. >> alisyn, over to you. >> thanks, guys.