None.

It is implied man is knocked down.

It is implied two pilots have been attacked by the "Japoteurs", but we see them tied up in rope.

A bomb is dropped and explodes on ground, causing several planes to stop.

Superman fights several people.

None.

A man smokes his cigarette, and stomps it on the newspaper he's been reading.

The world's largest bombing plane is hijacked by some Japanese saboteurs. Nothing particularly intense, besides from some mild fighting and Lois Lane in peril.