A website by the name of Genuine Gamers takes the credit for spotting a very creepy Easter Egg from the newly-released Homefront, as they should.
Apparently the egg can be found in the second mission once you enter the old school. Some boxes are sitting in front of the far right wall, and if you knock them over which will reveal a code. The QR code will provide you with an eerie Homefront wallpaper and a video. The video depicts a classroom in Iowa in the year 2027. The children are called out to recite the pledge of allegiance, however, this pledge is to the Korean overlords that have taken the once free country.
You can see the video below.