When the Aztecs sacrificed people to Huitzilopochtli (the god with warlike aspects) the victim would be placed on a sacrificial stone. The priest would then cut through the abdomen with an obsidian or flint blade. The heart would be torn out still beating and held towards the sky in honor to the Sun-God. The body would then be pushed down the pyramid where the Coyolxauhqui stone could be found. The Coyolxauhqui Stone recreates the story of Coyolxauhqui, Huitzilopochtli's sister who was dismembered at the base of a mountain, just as the sacrificial victims were. The body would be carried away and either cremated or given to the warrior responsible for the capture of the victim. He would either cut the body in pieces and send them to important people as an offering, or use the pieces for ritual cannibalism. The warrior would thus ascend one step in the hierarchy of the Aztec social classes, a system that rewarded successful warriors.
The United States spends a higher percentage of its GDP on health care than "any other nation in the world," although it should be noted that relevant data is only available for the year 2011.
The red blob may be a misshapen and/or discolored symbol showing regimen, status, or possibly achievement/rank based on the location of it. It could also be an injury stain?