... Homicide can be considered justifiable homicide if it is committed in self defense, the defense of others, while trying to prevent of serious crime, and in the line of duty.
Crimes of passion, in which death results from the "heat of the moment," is now considered a part of the defense of "provocation" against a charge of murder.
How many of us would kill Bin Laden if given the chance, or would have shot Hilter or Idi Amin... men responsible for killing thousands and thousands of people.
Compare the death toll of those dictatorships to that of abortion.
What becomes a justifiable action and at what point?