S.H.I.E.L.D Agent

Maria Hill: What does S.H.I.E.L.D. stand for,
Agent Ward?
Grant Ward: Strategic Homeland Intervention, Enforcement and Logistics Division.
Hill: And what does that mean to you?
Ward: It means someone really wanted our initials to
spell out "shield."... It means we're the line between
the world and the much weirder world. We protect
people from news they aren't ready to hear. And when
we can't do that, we keep them safe.
— Exchange between Hill and Ward