The crew called their big scene the Splash Page.
Thats the comic-book term for a full-spread illustration that either opens a story or marks its climax.
We all agree Nazis are bad, aliens from space are bad.

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But this movies the first time where you really have two points of view.
Which side of the aisle do we come down on?
So its hard for [Cap].
But… the takedown goes wrong.
A lot of people die.
A lot of innocent ones.
After all the chaos and catastrophe witnessed in the previous films, the world finally has had enough.
Government officials from around the globe assemble to enact accords that would clamp down on those with super-human skills.
But Cap has seen too much corrupt authority in his (unnaturally) long life.
He aint marching anymore.
Had Bucky not been brainwashed hed be doing the same thing Cap is doing, taking orders from S.H.I.E.L.D.
and fighting for the country and then realizing S.H.I.E.L.D.
is corrupt, Evans says.
But Buckys a different situation.
He obviously couldnt make these choices.
Apart from Peggy, Rogers only has one connection left to his old self.
No one on this planet knew him then.
No one is left, Evans says.
He doesnt have any peace with his youth.
Not just them as soldiers, but them as friends.
Leading the opposite side is… nobody.
Iron Man and Don Cheadles War Machine will be flying toward them, so theyll be added digitally later.
Directors Joe and Anthony Russo yell action and thats whats unleashed.
The good-guys charge each other in a savage beat-down.
The story is about family.
Weve been comparing it to a fight at a wedding.
[Cap is] such a strong, grounded, morally centered, ethically centered character.
Iron Man definitely tries.
NEXT PAGE:Targeting Captain America … Theyre trying to knock some unseen threat out of the air.
(Its hard to tell which visual effect theyre imagining.)
Its definitely not Iron Man.
Hes flying low and locked onto another target: Captain America.
The actor has to dive out of the way at the last second to avoid being clobbered.
I cant keep throwing punches when thats so close, he says.
The Russos come up with a solution: Go ahead and drop back.
The shot will end with Iron Man knocking Captain America to his knees.
But hes not going to stay there.