It has been reported this morning that a stray missile strike of one or more missiles hit a non military target in the city of Baghdad, killing 15 civilians.

The Washington Post article reporting this incident characterizes it as "the first major incident in nearly a week of war in which civilians died as a result of a U.S. airstrike error." If that is the case, then earlier incidents in which houses were blown to smithereens (is it smaller than a smither?) along with their occupants must have qualified as "targets of opportunity."