Carlos ran to do what he can to help out

What I will remember from the past week, a true hero!!

This spirit of love and devotion to the lives of strangers was never more apparent than in Carlos Arredondo.

Carlos and his wife were at the race in the VIP section passing out American flags. The couple is still mourning the loss of two sons, one of whom died in Iraq, while the other took his own life.

Image by Darren McCollester / Getty Images

But when the bombs went off, Carlos ran to do what he could, which it turned out was a lot. He was able to help save 27-year-old Jeff Bauman by closing his femoral artery to stem the bleeding. A moment that was captured in an instantly iconic photo.

And it's good Carlos was there, because it was a hospital bed tip from Bauman, who had "looked into the eyes of the man who tried to kill him," that helped the FBI identify the men responsible for the attack.