As the United States commemorated 'Memorial Day' on Monday, Dwayne Johnson penned a heartfelt tribute to those who sacrificed their lives serving in the US armed forces.Memorial Day is a federal holiday in the United States for remembering the people who lost their lives while serving in the United States Armed Forces. It is observed on the last Monday of May.'The Rock' shared a picture with his child on Instagram, where the two are seen watching a film. Along with the picture, he thanked the US armed forces for their unconditional services."Good way to close out our Memorial Day. The freedoms & safety to enjoy these blessed moments in my life with my babies, that I hold close to my ." he wrote.Johnson added, "I know don't come without a sacrifice and burden to endure. I'm forever grateful and honor all who gave their everything in service for the very blessings that we enjoy. Hope you had a blessed Memorial Day weekend with your families."The Rock went on to write that this is .