Mechanical engineers build weapons. Civil engineers build targets.
A dead baby can feed a family of four
One wears pants and a collar while the other wears a collar and pants.
They go shopping at a department store.
A boa constructor.
Because there's a Target on every corner
Oscar Pistorious has a better defence and more shots on Target
Their pacifists
A bow.
A Mechanical Engineer makes weapons, a Civil Engineer makes targets.