>> if you will be in new york city and like to be part of our audience email greg at fox news.com. >> greg: monday is memorial day. honoring men and women who served in the military. also the unofficial start of summer usually involves grilling burgers with friends and family. i was curious how this tradition came about. i enlisted a team of producers to dig deep into the history of the hamburger. they have been working on this video for several months. i'm told it's the most incredible video we have ever made. here is our latest installment of where does it come from. >> hamburger, where does it come from? cows. this has been where does it come from. [laughter] [applause] >> greg: somebody is getting fired. all right. final thoughts, joey? >> hey, guys, it's memorial day. it's official grill out day. it's also official remember your dead friends that served