This is what pilots ate on long flight missions during the Korean War. Stick around to the 26 minute mark and grand finale, we check out the Vietnam version of it and the can of Oreo cookies are so incredibly well preserved, you'll have to see it to believe it. Historical shelf stable food time capsules! A rare sight - I've only ever seen 3 of the IF-4's in the past 10 years. I replaced all the cans, so this one was restored. 1 million IF-4's were produced in 1950. I wonder how many remain? This is one of the last.