This photo shows President Lyndon Johnson wearing a medal that I can't ID:
LBJ supposedly won the Silver Star in WW2, but that looks different:
So, what is that medal on LBJ's lapel?
Update: The original image is apparently an AP photo. And AP says:
...Army Chief of Staff Westmoreland had just arrived and will address the American Legion Convention Tuesday evening on Sept. 10, 1968 in New Orleans,Los Angeles. No explanation for (the) medal on Johnson's lapel. ( AP Photo)