Learn Swedish: Flygledarens beslut ledde till passagerarens ombokning. - The air traffic controller's decision led to the passenger's rebooking.

This sentence uses nominalization to condense two full clauses into noun phrases. The verb besluta (to decide) becomes the noun beslut (decision), and the verb omboka (to rebook) becomes the noun ombokning (rebooking). Without nominalization, you would have to use a longer, clunkier sentence like: Att flygledaren beslutade detta ledde till att passageraren bokades om.

Why are flygledarens and passagerarens in the genitive form here?

When you transform a clause into a noun phrase, the original subject or object of the verb becomes a genitive modifier (the possessive form ending in -s). Instead of saying that the air traffic controller decided, we make the controller the 'owner' of the decision: flygledarens beslut.

Why does ombokning end in the suffix -ning?

The suffix -ning is a very common tool for nominalization in Swedish. It transforms verbs (especially those ending in -a, like omboka) into verbal nouns that describe the action or the result of the action, much like '-ing' or '-tion' in English.

Why do we use the preposition till after ledde?