The VFW distributes them yearly. I don't know if they are sold or what. I haven't seen that many around my neck of the woods for years. I have an old one I keep on hand. The VFW website explains it.
Although all veterans are often honored on this holiday, it was originally for those men and women who died in the Civil War. I think I mentioned this in last years Memorial Day post.
The poppy symbol, however, is from WWI, a war my great uncle served in. I am told he had to alter his age in order to enlist. Eventually he did such a good job the Government asked him back for WWII. I believe he was a boiler maker of some kind. I think he was in the Pacific during WWII.
Now a poem:
Remember now the smoke and grime
Battering and bellowing towards the line
Stand did they, when came their time
Refusing to relinquish but for Liberty to shine.
These things were done, not without thought
But for Freedom's kinsmen, they put in their lot.
And for now we recall their heroic charge
To look, to hear, to understand-
O brothers, sisters, remember now.